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Reproductive Systems

BIO 105

Chapter 17

Reproductive System

In both sexes, the reproductive systems

consist of both primary reproductive organs (gonads) and accessory

structures

Functions of the testes

1. Gamete production

2. Hormone production

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Testis anatomy Seminiferous

Tubules

SpermiogenesisHormone Production

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The Scrotum & Temperature

RegulationDuct System & Accessory Glands

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Penile erection, Erectile Dysfunction (ED),

and Viagra

Female Reproductive Anatomy

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Gametogenesis (Oogenesis)

• Oogonia produced during fetal life

• Prior to birth, some oogonia enter Meiosis

and are now primary oocytes

• Primary oocytes become surrounded by a

layer of follicular cells

• Primary follicle = primary oocyte +

follicular cells

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Menopause

Cessation of normal ovarian function

• Oocytes cease developing

• Hormone levels fall

• Ovulation stops

• Menstrual cycles stop