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Sperm (pl.: sperm or sperms) is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction (forms in which there is a larger, female reproductive cell and a smaller, male one). Animals produce motile sperm with a tail known as a flagellum, which are known as spermatozoa, while … 展开
Function
The main sperm function is to reach the ovum and fuse with it to deliver two sub-cellular structures: (i) the male pronucleus that contains the genetic … 展开Motile sperm cells typically move via flagella and require a water medium in order to swim toward the egg for fertilization. In animals … 展开
In almost all embryophytes, including most gymnosperms and all angiosperms, the male gametophytes (pollen grains) are the primary mode of 展开
Sperm cells in algal and many plant gametophytes are produced in male gametangia (antheridia) via mitotic division. In 展开
Non-motile sperm cells called spermatia lack flagella and therefore cannot swim. Spermatia are produced in a spermatangium.
Because spermatia cannot … 展开Most sperm cells have centrioles in the sperm neck. Sperm of many animals has two typical centrioles, known as the proximal centriole and distal centriole. Some animals (including … 展开
CC-BY-SA 许可证中的维基百科文本 Semen - Wikipedia
Depending on the species, spermatozoa can fertilize ova externally or internally. In external fertilization, the spermatozoa fertilize the ova directly, outside of the female's sexual organs. Female fish, for example, spawn ova into their aquatic environment, where they are fertilized by the semen of the male fish.
Internal fertilization occurs inside the female's sexual organs after a male inseminates a female th…Wikipedia · CC-BY-SA 许可下的文字- Buffering capacity (β): 25
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- Osmolarity (mOsm): 354
- Viscosity (cP): 3-7
Semen quality - Wikipedia
网页Semen quality is a measure of male fertility, a measure of the ability of sperm in semen to accomplish fertilization. Semen quality involves both sperm quantity and quality. Semen …
精液 - 维基百科，自由的百科全书
网页以人類為例，精子是正常精液當中的主要成分，以及與女性卵細胞受精的載體。 精液（英語： Semen ），闽南话、台灣話、潮汕话叫做“潲”或“ …
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Spermatozoon - Wikipedia
网页A spermatozoon (/ s p ər ˌ m æ t ə ˈ z oʊ. ən, ˌ s p ɜːr m ə t ə-/; [1] also spelled spermatozoön; pl.: spermatozoa; from Ancient Greek σπέρμα (spérma) 'seed' and ζῷον (zôion) 'animal') is a motile sperm cell …
Category : Human semen - Wikimedia
网页2024年2月12日 · Sperm after ejaculation process.JPG 1,632 × 1,224; 356 KB. Sperm clot.png 750 × 1,334; 1.03 MB. Sperm.jpg 893 × 524; 19 KB. ... In Wikipedia. Add links. …
Spermatogenesis - Wikipedia
网页Spermatogenesis produces mature male gametes, commonly called sperm but more specifically known as spermatozoa, which are able to fertilize the counterpart female gamete, the oocyte, during conception to produce a …
Sperm | Definition, Function, Life Cycle, & Facts
网页Sperm, male reproductive cell, produced by most animals. In higher vertebrates, especially mammals, sperm are produced in the testes. The sperm unites with (fertilizes) the ovum (egg) of a female to produce a …
Sperm motility - Wikipedia
网页Sperm motility. Sperm motility describes the ability of sperm to move properly through the female reproductive tract (internal fertilization) or through water (external fertilization) to …
Sperm - Simple English Wikipedia, the free encyclopedia
网页Human sperm is made in the testicles of a man. Human sperm contains 23 chromosomes. A human needs 46 chromosomes, so a sperm cell is called a haploid as it only has half. The other half is contained within the ovum …
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