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Produce gametes (sperm) and hormones (testosterone, inhibin)
Parenchyma:
Leydig Cells (💡"Leydig" stimulated by "LH"
LH stimulates Leydig cells to produce androgens
Sertoli Cells
FSH stimulates Sertoli Cell function ➡️spermatogenesis
"Nurse cells" of sperm
Tight junctions establish blood-testis barrier - protecting germ cells from rest of immune system
Seminiferous Tubules
Site of sperm production
Mediastinum:
Central connective tissue core
Epididymis:
Head (Caput)
Body
Tail (Cauda)
Tubular and Duct Systems of Testes
Tubular and Duct Systems of Testes
Tunica Albuginea divides the testis into lobules via projections
Seminiferous tubules:
Highly convoluted
Packed into lobules by tunica albuginea
Spermatogenesis (💡"sperm" + "gen" = "sperm produced")
Image credit: lecture 36
The Testes and Excurrent Duct System
The Testes and Excurrent Duct System
Efferent Ducts:
Epididymis
Site of sperm maturation and storage
Sperm become concentrated
Ductus Deferens
Image credit: lecture 36
Test Yourself:
Test Yourself:
Q: What do the testes produce?
Q: What do the testes produce?
A: Gametes (sperm) and hormones (testosterone, inhibin)
Q: What divides the testes into different lobules?
Q: What divides the testes into different lobules?
A: Tunica Albuginea
Q: What is the epididymis the site of?
Q: What is the epididymis the site of?
A: Sperm maturation and storage
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