Reproduction

Chapter 46

Reproductive System

Sexual behavior in parthenogenetic lizards

(a)

The release of eggs and external fertilization

Sea urchin sperm fertilizing an egg

Parental care in an invertebrate

Male Reproductive System

Male Reproductive System

Spermatogenesis

Seminiferous Tubules & Sperm

Structure of Sperm

Hormonal control of the testes

Female Reproductive System

Female Reproductive System

Oogenesis

Eggs mature in the ovaries: Each egg within a follicle

More Oogenesis & Follicles

Ovulation: Release of a mature egg into Fallopial tube

Female Reproductive Cycle

Sperm Fertilizing Egg

Formation of the zygote and early postfertilization events

Placental circulation

Human Fetal Development

• 1st Trimester – Early organ development

• 2nd Trimester – Organ development

• 3rd Trimester – Growth

Hormonal Induction of Labor

Three Stages of Labor