acrosome
基礎(chǔ)科學

        A membrane-bound structure inthe anterior head region of a spermatozoon,usually forming a cap over the nucleus. Itcontains enzymes that are released on contactwith the egg at fertilization and break downthe egg coats,enabling the spermatozoon nu-cleus to ......（本文共 296 字）     [閱讀本文] >>