We have got to be mature like cheddar used in this delicious snack
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Reproduction
Male Reproductive System Female Reproductive system
Primary Sex Organs vs. Accessories
• Primary makes gametes• Accessories include – ducts, – genatalia – glands
Lets start with the easy stuff 1st
• Testicles• Penis• Seminal Vesicles• Epididymis • Vas Deferens • Ejaculatory Duct• Prostate Gland • Bulbourethral gland
• Leydig Cell• Sertoli Cell
Mitosis vs Meiosis review
• Meiosis • Mitosis
Describe Structure and Function of the gonads and accessories
• Testicles• Penis• Seminal Vesicles• Epididymis Seminiferous
Tubules
• Vas Deferens • Ejaculatory
Duct• Prostate Gland • Bulbourethral
gland Chapter 27
Spermatogenesis
• Starts with 1 “spermatocyte”– Primary germ line
• End up with 4 spermatids
• How many chromosomes are in 1 spermatocyte?
• How many chromosomes are in 1 spermatid?
This meiosis happens in seminiferous tubules
Seminiferous tubules
• Lumen surounded by Sertoli Cells• Help maintain liquid environment of lumen for
sperm to develop• Prevent blood from traveling to lumen
Gap Junctions of sertoli cells
• Mitosis of primary spermatocye happens above gap junction
• Meiosis happens below gap junction between cell membranes
Hormones involved
• Sertoli cells release messengers in response– Testosterone (T)– Follicle Stimulating Hormone (FSH)– Luetenizing Hormone (LH)– Gonadotrpoin Releasing Hormone (GnRH)
Leydig Cells
• The ones that generate and release Testosterone (T)
• T essential for proliferation and differentiation of sperm
Quick write: How does the hypothalamus affect the testis?
Spermatogenesis
• Must be cooler than body temperature