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Head cap

From Biology-Online Dictionary | Biology-Online Dictionary
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Head cap --> acrosomal cap

a collapsed membranous vesicle that covers the anterior part of the nucleus of the spermatozoon, derived from the acrosomal granule; the carbohydrate-rich substance of the cap is associated with hydrolytic enzymes that aid in sperm penetration of the zona pellucida of the ovum.

Synonym: head cap.