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]]