Spermatogenesis - Human Embryology
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Spermatogenesis
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The process by which spermatogonia become spermatids
Begins in puberty
Occurs in the seminiferous tubules
As spermatogonia mature, they move from the basal layer of the seminiferous tubule to its lumen
Spermatogonia (2n, diploid) cross the blood-testis barrier → primary spermatocytes (2n, diploid) → secondary spermatocytes (1n, haploid) → spermatids (1n, haploid)
Duration: ∼ 2 months
Spermiogenesis
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The process by which spermatids become spermatozoa
Requires testosterone
Formation of the acrosome
.Derived from the Golgi apparatus
.Contains acid phosphatase, neuraminidase, and hyaluronidase
Loss of cytoplasmic content
Condensation of genetic material
Spermatid elongation
Development of the flagellum (dysfunctional or absent in primary ciliary dyskinesia/Kartagener syndrome)
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3 سال پیش
در تاریخ 1400/02/18 منتشر شده
است.
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