Acrosome
249778
219915606
2008-06-17T13:05:28Z
Thijs!bot
1392310
robot Adding: [[ro:Acrozom]]
In [[spermatozoon|spermatozoa]] (also known as sperm/sperm cell) of many animals, the '''Acrosome''' is an [[organelle]] that develops over the anterior half of the sperm's head. It is a cap-like structure derived from the [[Golgi apparatus]]. Acrosome formation is completed during testicular maturation. In [[Eutheria]]n [[mammals]] the acrosome contains digestive [[enzyme]]s (including [[hyaluronidase]] and [[acrosin]]). <ref>{{cite web |url=http://encarta.msn.com/encnet/features/dictionary/DictionaryResults.aspx?refid=1861695331 |title=acrosome definition - Dictionary - MSN Encarta |accessdate=2007-08-15 |format= |work=}}</ref> These enzymes breakdown the outer membrane of the [[ovum]] called the [[zona pellucida]], allowing the [[haploid]] [[nuclei]] in the sperm to join with the haploid nucleus found in the ova.
[[Image:Simplified spermatozoon diagram.svg|thumb|center|550px|Human spermatozoön]]
==See also==
* [[Acrosome reaction]]
* [[Capacitation]]
==References==
<references/>
{{Organelles}}
[[Category:Andrology]]
[[Category:Germ cells]]
[[Category:Organelles]]
[[Category:Reproductive system]]
[[bg:Акрозома]]
[[ca:Acrosoma]]
[[cs:Akrozom]]
[[de:Akrosom]]
[[el:Ακρόσωμα]]
[[es:Acrosoma]]
[[fr:Acrosome]]
[[ko:첨체]]
[[lt:Akrosoma]]
[[ja:先体]]
[[pl:Akrosom]]
[[ro:Acrozom]]
[[ru:Акросома]]
[[sr:Акрозом]]
[[sv:Akrosom]]
[[tl:Acrosome]]
[[tr:Akrozom]]
[[uk:Акросома]]
[[zh:顶体]]