we have got to be mature like cheddar used in this delicious snack paper time

We have got to be mature like cheddar used in this delicious snack

Paper Time

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

Hypothalamus – Pituitary Gland

Quick write: How does the hypothalamus affect the testis?

Spermatogenesis

• Must be cooler than body temperature

Erectile Tissue