Spermiogenesis
Spermiogenesis
Spermiogenesis (pronunciation: /ˌspɜːrmiːoʊˈdʒɛnɪsɪs/) is the final stage in the process of spermatogenesis, which involves the development of spermatozoa from spermatids. The term is derived from the Greek words "sperma" meaning seed and "genesis" meaning origin or creation.
Process
Spermiogenesis involves a series of morphological and physiological changes that transform spermatids into mature, motile spermatozoa. These changes include the formation of the acrosome, the development of the flagellum, and the condensation of the nucleus.
Stages
Spermiogenesis is divided into four stages: the Golgi phase, the cap phase, the acrosomal phase, and the maturation phase. Each stage is characterized by specific changes in the structure and function of the developing spermatozoon.
Golgi Phase
In the Golgi phase, the Golgi apparatus forms a structure called the acrosomal vesicle, which will eventually become the acrosome.
Cap Phase
During the cap phase, the acrosomal vesicle spreads over the nucleus to form a cap-like structure.
Acrosomal Phase
In the acrosomal phase, the nucleus condenses and the developing spermatozoon begins to take on its characteristic shape.
Maturation Phase
The maturation phase is the final stage of spermiogenesis, during which the spermatozoon acquires motility and becomes capable of fertilizing an ovum.
Related Terms
External links
- Medical encyclopedia article on Spermiogenesis
- Wikipedia's article - Spermiogenesis
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