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Sperm meaning in Biology

The male reproductive cell is known as sperm or male gamete, in an organism that undergoes sexual reproduction i.e. in anisogamous form. Sperms are motile in nature with flagellum in the case of animals, which is also called spermatozoa, whereas a few red algae and fungi produce non-motile sperm cells which are commonly known as spermatia Sperm definition is - semen. How to use sperm in a sentence. Recent Examples on the Web: Noun Embryonic stem cells are the first cells to form after a sperm fertilizes an egg, and are the ultimate seed with the most potential to turn into other cells. — AZCentral.com, 9 June 2021 While the male donor lives at the Fossil Rim Wildlife Center in Texas, and the female donor lives in Columbus. sperm in Biology topic From Longman Dictionary of Contemporary English sperm /spɜːm $ spɜːrm/ noun (plural sperm or sperms) 1 [ countable] (also sperm cell) a cell produced by the sex organs of a male person or animal, which is able to join with the female egg to produce a new life 2 [ uncountable Sperm, also called spermatozoon, plural spermatozoa, male reproductive cell, produced by most animals. With the exception of nematode worms, decapods (e.g., crayfish), diplopods (e.g., millipedes), and mites, sperm are flagellated; that is, they have a whiplike tail. In higher vertebrates, especially mammals, sperm are produced in the testes

Sperm - Meaning, Structure, Role, and FAQ

The smaller, usually motile male reproductive cell of most organisms that reproduce sexually. Sperm cells are haploid (they have half the number of chromosomes as the other cells in the organism's body). Sperm often have at least one flagellum (The sperm is the small white cell to the left.) A sperm cell is the male sex cell. All animals (and many other types of organisms) produce what are called sex cells. Sex cells are the cells, that,.. Sperm cells are gametes (sex cells) that are produced in the testicular organ (gonad) of male human beings and animals. Like the female gamete (oocyte), sperm cells carry a total of 23 chromosomes that are a result of a process known as meiosis Sperm motility is the ability of sperm to move through water during external fertilization or within the female reproductive tract for internal fertilization to reach the egg. Motility also refers to the quality of the sperm motion, meaning that sperm which does not move properly can't reach the egg and successfully fertilize it pro- forward, favoring, before: producer -sperm- seed: angiosperm stom, -stoma mouth: stomata -troph- nourishment, one who feels: autotroph xyl- wood: xylem Unit 7: Ecology Root/Prefix/Suffix Meaning & Examples eco- house: ecosystem, ecology en- made of: environment ex- out of, away from: extinction geo- land, earth: biogeochemical im- to, toward, into: immigratio

Sperm Definition of Sperm by Merriam-Webste

  1. A spermis a cell consisting of a round or cylindrical nucleated cell, a short neck, and a thin motile tail. Its structure is vital to its mobility and function(i.e. sexual reproduction). The compacted nucleuscontains half of the genetic information. It fuses with an ovum(the female gamete) to form a zygote
  2. sperm. (spûrm) n. pl. sperm or sperms. 1. A male gamete, such as a spermatozoon of an animal or one of the cells or nuclei produced by a pollen grain of a plant. Also called sperm cell. 2. Semen
  3. Sperm are haploid cells, meaning they have half the number of chromosomes that other cells of the body, which are diploid cells, have. Sperm must be haploid in order for normal sexual reproduction to occur. During reproduction, a sperm unites with another cell, called an egg. This is called fertilization

Sperm competition, a special form of mating competition that occurs in sexual species when females accept multiple mating partners over a relatively short period of time Every second, the average man produces 1,500 sperm adding up to over 500 billion over the course of his life. The machinery that makes sperm is a marvel of biology with a single goal in mind - creating life. This article explores the micro world of sperm production and the key factors that affect proper sperm development Sperm: A sperm is the male gamete or sex cell. It combines with the female gamete, called an ovum, to form a zygote. The formation process is called fertilization . (see ovum, zygote) a sex cell produced by a man or male animal: In human reproduction, one female egg is usually fertilized by one sperm

n. pl. sperm or sperms 1. A male gamete, such as a spermatozoon of an animal or one of the cells or nuclei produced by a pollen grain of a plant. Also called sperm cell Keywords: Sperm, Ova, Fertilization Sperm capacitation refers to the physiological changes spermatozoa must undergo in order to have the ability to penetrate and fertilize an egg. This term was first coined in 1952 by Colin Russell Austin based on independent studies conducted by Austin and Min Chueh Chang and published in 1951 A sperm is a cell which is produced in the sex organs of a male animal and can enter a female animal's egg and fertilize it. Conception occurs when a single sperm fuses with an egg. Any disease which undermines a man's general health will interfere with his sperm production. Doctor believed that his low sperm count was the problem

sperm Definition from the Biology topic Biolog

  1. Sperm is the male reproductive cell in vertebrates. The term is derived from the Greek word sperma meaning seed. Sperm were first observed under a microscope in 1677 by Antonie van Leeuwenhoek.
  2. Sperm Biology represents the first analysis of the evolutionary significance of sperm phenotypes and derived sperm traits and the possible selection pressures responsible for sperm-egg coevolution.. An understanding of sperm evolution is fast developing and promises to shed light on many topics from basic reproductive biology to the evolutionary process itself as well as the sperm proteome.
  3. Sperm cell definition, spermatozoon. See more. Earlier this year, security at major airports was tightened because of a tip that al-Asiri had been working on a cell phone bomb
  4. Gamete DefinitionGametes are haploid reproductive cells in sexually reproducing organisms that fuse together during fertilization. Fertilization creates a diploid cell that goes through repeated rounds of cell division to produce a new individual. Gametes are the physical carriers of genetic information from one generation to the next
  5. The human sperm cell is the reproductive cell in males and will only survive in warm environments; once it leaves the male body the sperm's survival likelihood is reduced and it may die, thereby decreasing the total sperm quality. Sperm cells come in two types, female and male

sperm Definition, Function, Life Cycle, & Facts Britannic

High School Biology: Help and Review Identify the term from the following definition: The end of a sperm that contains digestive enzymes. 3. In Sea urchin, acrosomal reaction is artificially. Definition of sperm noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more Hermaphrodite Definition. A hermaphrodite is an organism with both male and female genitalia. In sexually reproducing organisms, males have organs that produce male gametes, usually sperm. Females have different sexual organs that produce female gametes, usually called eggs

Sperm production usually continues uninterrupted until death, although the number and quality of sperm decline during later adulthood. Spermatogenesis. The process of producing mature sperm is called spermatogenesis. Sperm are produced in the seminiferous tubules of the testes and become mature in the epididymis. The entire process takes about. Sperm and semen are two components produced by the male reproductive system. Both sperm and semen play a major role in fertilizing the female egg cell. Difference Between Sperm and Semen Definition. Sperm: Sperm is a male reproductive cell. Semen: Semen is the reproductive fluid of males, which contains sperms in suspension. Occurrenc

Name: Block:Date: Biology 12 - The Reproductive System! • Part A: Definitions: Please define or explain the following terms, in your OWN WORDS, in as few words as clarity allows. a) testes male gonads which produce sperm and testosterone b) scrotum sac in which testes are suspended, hang underneath penis outside male's bod Semen analysis is a test of a man's sperm and semen. Also known as a sperm count or male fertility test, its results show how many sperm are released, as well as how they're shaped and how well. A low sperm count is often referred to as oligospermia. A high, or above average, sperm count is over 200 million sperm per millimeter. You can determine your sperm count through a semen analysis.

Sperm Definition of Sperm at Dictionary

A mature human sperm cell has snake like structure.It has following parts - head, neck, middle piece and tail. Head: It is spherical in shape consisting of large nucleus and a dome shaped acrosome present on the nucleus. Function: Nucleus contain genetic information and half number of chromosomes. The acrosome releases a hyaluronidase enzyme which destroys the hyaluronic acid of the ovum and. organisms that reproduce sexually have got to get their genes together somehow to do this they package their genetic material into specialized cells called sex cells this is the sperm cell it's the sex cell of the male the sole purpose of the sperm the entire reason for its existence is to transfer the males genetic material into the female sex cell or the egg so the sperm cell is packed with. Sperm motility is a reliable predictor for sperm quality and fertilization success (Au et al., 2002).After exposure to hypoxia for 12 weeks, sperm motility (measured by their curvilinear velocity VCL, straight‐line velocity VSL, and angular path velocity VAP) was significantly decreased in male carp (Table 3.2), indicating that sperm quality was impaired A mature sperm cell has several structures that help it reach and penetrate an egg. These are labeled in the drawing of a sperm shown in Figure \(\PageIndex{2}\). The head is the part of the sperm that contains the nucleus — and not much else. The nucleus, in turn, contains tightly coiled DNA that is the male parent's contribution to the.

Sperm Cell: Definition & Function - Video & Lesson

  1. Testis definition is - a typically paired male reproductive gland that produces sperm and secretes testosterone and that in most mammals is contained within the scrotum at sexual maturity
  2. Start studying BIOLOGY: Sperm and Egg Compare and Contrast. Learn vocabulary, terms, and more with flashcards, games, and other study tools
  3. ation. assisted reproduction
  4. Sexual reproduction starts with the combination of a sperm and an egg in a process called fertilization. This can occur either inside (internal fertilization) or outside (external fertilization) the body of the female.Humans provide an example of the former whereas seahorse reproduction is an example of the latter
  5. al proteins are removed from the surface of the sperm's acrosome by substances secreted by the uterus or fallopian tubes of the female genital tract, thereby permitting the acrosome reaction to occur. Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing.

Sperm Cells - Definition, Function, Structure, Adaptations

Fetal Developmental Timeline | Timetoast timelines

The human reproductive system is different in males and females. When a sperm and egg join, the egg is fertilised and a baby starts to develop. Its mother provides all a baby's needs until it is. The definition of contraception in human physiology could be described as birth control through the deliberate prevention of conception or impregnation. The link between pregnancy and a man's semen u was not clearly understood in ancient times. The earliest contraceptive methods involved preventing semen from entering a woman's uterus Each sperm cell, or spermatozoon, is small and motile. The spermatozoon has a flagellum, which is a tail-shaped structure that allows the cell to propel and move. In contrast, each egg cell, or.

Sperm Capacitation. Sperm capacitations correspond to some physiological changes of the spermatozoa in the female genital tract before they are capable of penetrating and fertilizing the eggs. From: Olives and Olive Oil in Health and Disease Prevention (Second Edition), 2021. Download as PDF. About this page Spermatogenesis is the process of formation of spermatozoa (sperms) in the testes which originate from the primordial germ cells (PCGs). The process of Spermatogenesis initiates at puberty and continues even in the old age. The process of Spermatogenesis comprised the following two main stages-. 1. Formation of spermatids

from LIFE: The Science of Biology, Purves et al, 1998 After making its way through the jelly coat, the sperm makes contact with the vitelline envelope. Species-specific bindin receptors on the vitelline envelope are only able to recognize bindin molecules from the same species Zygote Definition. A zygote is the first diploid cell that is formed by the fusion of male and female gametes resulting in the formation of an embryo. The zygote stage development occurs in the first week of fertilization. The genome of the zygote is the combination of DNA in each gamete and contains all the genetic information required to form. Biology I. Reproductive System. Search for: Gametogenesis. Gametogenesis, the production of sperm and eggs, takes place through the process of meiosis. During meiosis, two cell divisions separate the paired chromosomes in the nucleus and then separate the chromatids that were made during an earlier stage of the cell's life cycle. Meiosis. Fertilization involves following processes: 1. Approach of sperm to ovum: During the copulation, male inserts its erectile penis in the vagina of female and releases about 3.5 ml of seminal fluid. This process is called ejaculation. Seminal fluid contains as many as 200-300 million sperms sperm-or sperma-or spermi-or spermo-or spermat-or spermato-[Greek sperma seed, semen, race, origin] Denotes seed, sperm, germ, semen . sphen-or spheno-[Greek sphen wedge] (1) wedge, wedge-shaped (Sphenisciformes); (2) of or pertaining to the sphenoid. PICTURE OF SPHENOID. sphygm-or sphygmo-[Greek sphygmos pulse] Denotes the pulse

Last male sperm precedence: A situation that results in fertilization of the ovum by the sperm of the last male in multiply inseminated female. This is due to sperm incapacitation by the semen and sperm displacement. This well-documented form of sperm competition is best known in Drosophila. Logic in Mathematics Lesson Plan Once released, egg and sperm alike are destined to die within minutes or hours unless they find each other and fuse in the process of fertilization. Through fertilization, the egg and sperm are saved: the egg is activated to begin its developmental program, and the haploid nuclei of the two gametes come together to form the genome of a new diploid organism

Sperm Motility Biology Dictionar

In vitro fertilization (IVF) is a complex series of procedures used to help with fertility or prevent genetic problems and assist with the conception of a child. During IVF, mature eggs are collected (retrieved) from ovaries and fertilized by sperm in a lab. Then the fertilized egg (embryo) or eggs (embryos) are transferred to a uterus Jennifer Kennedy, M.S., is an environmental educator specializing in marine life. She serves as the executive director of the Blue Ocean Society for Marine Conservation. Claspers are organs that found on male elasmobranchs (sharks, skates, and rays) and Holocephalans ( chimaeras ). These parts of the animal are vital for the reproduction process Human development begins after the union of male and female gametes or germ cells during a process known as fertilization (conception). Fertilization is a sequence of events that begins with the contact of a sperm (spermatozoon) with a secondary oocyte (ovum) and ends with the fusion of their pronuclei (the haploid nuclei of the sperm and ovum) and the mingling of their chromosomes to form a.

Examples That Help Understand the Meaning of Gametic Isolation. A prezygotic barrier to reproduction, gametic isolation prevents fertilization, as the sperm cells of a species can't unite with the eggs of a different species. We will help you understand how this type of isolation works, by putting forth some examples of the same Gametes have adaptations to increase the chances of fertilisation and successful development of an embryo. For example, sperm cells are produced in large numbers to increase the chance of. ADVERTISEMENTS: In this article we will discuss about Fertilisation in Animals:- 1. Meaning of Fertilisation 2. Process of Fertilisation 3. Kinds 4. Significance. Meaning of Fertilisation: The union of the cytoplasm and pronuclei of the male and female gametes is known as the fertilisation (L., fertilis = to bear; frevo = to bear). The fertilisation [ Gametes are haploid cells that carry reproductive functions produced through meiosis. Gametes carried by males are called sperms and gametes carried by females are called eggs. By joining during fertilization, gametes form a zygote, which is a diploid. gametes haploid diploid cells sperm eggs isogametes spermatogenesis oogenesis

What Does Acrosome Reaction Mean? The acrosomal reaction is the process of the egg and sperm cells fusing together during fertilization. Acrosomal reactions are an essential step of conception, and any abnormality can prevent fertilization and cause infertility Of the two sperm cells, one sperm fertilizes the egg cell, forming a diploid zygote; the other sperm fuses with the two polar nuclei, forming a triploid cell that develops into the endosperm. Together, these two fertilization events in angiosperms are known as double fertilization. After fertilization is complete, no other sperm can enter Haploid. Haploid (meaning simple in Greek) cells bear one copy of each chromosome.. Most fungi, and a few algae exist as haploid organisms, male bees, wasps and ants are also haploid. For organisms that only ever have one set of chromosomes, the term monoploid can be used interchangably with haploid.. Plants and other algae switch between a haploid and a diploid or polyploid state, with one of. The sensory homunculus. The homunculus is also commonly used to describe the distorted human figure drawn to reflect the relative sensory space our body parts represent on the cerebral cortex.The lips, hands, feet and sex organs are considerably more sensitive than other parts of the body, so the homunculus has grossly large lips, hands and genitals Aneuploidy Definition. Changes in the genetic material of a cell are called mutations. During some types of mutations, cells end up with an extra or missing chromosome. This condition in which cells of a person have one or a few chromosomes below or above the normal chromosome number.is called as Aneuploidy

  1. A zygote is the simplest form of life, so once a zygote is formed, it proceeds to split and divide into new cells that organize and form more complex structures. Around 30 hours after the zygote is formed, the process of mitosis (cell division) begins, which increases the number of cells without any increase in the zygote's total size
  2. Definition. Semen is a part which consists of different materials including sperm. Sperm is a part which is present in the semen. State. Semen is in the form of liquid. Sperm is a little harder. Influence. Semen can affect sperm and convert it into a fluid form. Sperm cannot influence these changes in the semen
  3. Sperm is attracted to and contacts the jelly layer/zona pellucida. The interactions between receptors on the sperm cell and glycoproteins on the egg cell initiate the acrosome reaction. Digestive enzymes are released from the acrosome, and they destroy the jelly layer/zona pellucida thus creating a pathway for the sperm to approach the egg

* Sperm (Biology) - Definition - Online Encyclopedi

  1. Explaining why sperm are so variable has been a major focus in evolutionary biology over the last 100 years because sperm, no matter from what organism, always have the same function: to fertilize.
  2. Definition of sperm head in the Definitions.net dictionary. Meaning of sperm head. What does sperm head mean? Information and translations of sperm head in the most comprehensive dictionary definitions resource on the web
  3. ation where the egg and the sperm are placed in the same culture environment for fertilization

Sperm donation is a process in which a man provides his sperms. These sperms may be donated for the 'fertility treatment' of a woman or for artificial insemination, a process in which sperms are introduced in the female's cervix by means other than sexual intercourse This means spermatogenesis is the complete process of the production of the sperm cells from the cells of the germinal epithelium of males. Spermiogenesis, on the other hand, is the final differentiation and maturation process of the spermatids into sperm cells. Key Areas Covered. 1. What is Spermatogenesis - Definition, Stages, Types 2

Difference Between Sperm and Ovum. Male gametes (sperms) and female gametes (ova) are produced after the cycle of spermatogenesis and oogenesis, respectively. Both sperm and ovum differ in many ways like their structure, motility, shape, size etc. Structure of Sperm. Sperm is yolkless. The size of the sperm is smaller than the spermatocytes Sperm velocities are on the order of tens of microns per second, so anything that changes the sperm swimming speed by even 0.1% is more important than the mass difference in sedimentation. Putting this together, it suggests that mass differences are not a likely origin for sex ratios slightly deviating from one - if they are tuned, it would. Sperm with vigorous motility (progressive, intermediate, and hyperactivated) in our training set had mean VCL values of greater than 279 μm/sec, whereas the nonvigorous groups (slow and weakly motile) had mean VCL values of less than 176 μm/sec. Additional examples of each motility pattern are shown at higher magnification in Supplemental. Sperm transport through the epididymis takes approximately twenty days. As sperm transit the epididymis, they are bathed in a specialized fluid rich in proteins, ions , and a number of other molecules. Complex interactions between spermatozoa and epididymal fluid contribute to sperm maturation

As the sperm approach the egg, they bind to the zona pellucida in a process known as sperm binding. This triggers the acrosome reaction, in which the enzymes of the acrosome are freed. These enzymes then begin to digest the zona pellucida and allow the sperm to tunnel toward the egg's plasma membrane It is largely accepted that features such as parental care of young (brooding) and complex fertilization biology are derived features, having always evolved from simple reproductive methods such as external fertilization with no parental involvement in offspring survival. This is reflected in the continued use of words such as 'primitive' and 'modified' sperm Furthermore, sperm are often portrayed as the protagonist and driving force. The truth of the matter is, sperm cells do not contain brains. Instead of dreams and goals, they randomly thrash about.

Sperm definition of sperm by Medical dictionar

Motility. Motility is spontaneous movement. One example is the automatic stomach contractions that move the food content along from the stomach into the intestines. A motility disease is one that involves changes in the way the stomach contracts. Mentioned in: Gastric Emptying Scan, Indigestion, Semen Analysis. Gale Encyclopedia of Medicine Perisperm meaning is peri + sperm, unused nucellus present in some seed and surrounds embryo sac,remnants of a nucellus is persistent,this residual, persistent nucellus is called perisperm.. The Seed, the characteristic reproductive body of both angiosperms (flowering plants) and gymnosperms (e.g., conifers, cycads, and ginkgos). Essentially, a seed consists of a miniature undeveloped plant. Sperm were collected from males on two dates, 1 week apart (see Materials and methods); those in the first collection had slightly higher mean mitochondrial activity, percentage motility and sperm swimming speed than those in the second collection (supplementary material Table S1).We included the factor 'date' in our analyses in order to remove variance attributable to this variable The epididymis is a long, coiled tube that stores sperm and transports it from the testes. It appears as a curved structure on the posterior (back) margin of each testis. It is comprised of three.

Zygotes | definition of Zygotes by Medical dictionaryLecture 13 - Biology 172 with Janakiraman at University ofCampbell Biology Chapter 38 Key Terms Flashcards | Easy

The field of biology describes isolation as a process by which two species that could otherwise produce hybrid offspring are prevented from doing so. There are five isolation processes that prevent two species from interbreeding: ecological, temporal, behavioral, mechanical/chemical and geographical sarcoma /sar-KŌM-ə/ n. Cancer of muscle or connective tissue.Specific types of sarcomas are named for the types of tissue from which they arise (e.g., angiosarcoma, chondrosarcoma, hemangiosarcoma, leiomyosarcoma, liposarcoma, lymphangiosarcoma, osteosarcoma, rhabdomyosarcoma). sarcomere /SARK-ə-meer/ n. The sarcomere is the fundamental unit of muscle structure While the problems usually associated with sexual behavior are real and need to be addressed, human sexuality also has significant meaning and value in each individual's life. Reproductive Biology Reproductive physical maturity and the capacity for human reproduction begin during puberty , a period of rapid growth and change experienced by both. In humans, the optimal temperature for sperm production is just below body temperature, in a range of about 90-95 degrees F. Human studies have found that exposure to temperatures as little as 1 degree C (1.8 F) above this normal range adversely affects male fertility, said Diana Libuda, a professor in the Department of Biology and Institute of. Biology Textbooks and Scientists Agree: Human Life Begins at Conception. At the Idaho Statesman Journal's science blog, Susie Bodman (at the time an editor at the paper) responds to the pro-life contention that life begins at conception: As a biology student, I'm sorry, but the stipulation that 'life begins at conception' is.