Page 68 - Science Course 2 (Book 1)

Mo3-L1a: What are the Reproductive Systems of Humans?

Let’s Begin The cell that forms when an egg
and a sperm join together is
called a zygote.

Reproduction and Hormones
Some of the organs of the endocrine system
produce hormones that help humans reproduce. The male reproductive system produces sperm in
the testes and delivers it to the female reproductive
Reproduction is the process by which new system.
organisms are produced.

Sperm duct

Penis

Testis

Testosterone—also produced in the testes—helps
sperm change from round cells to long, slender
Human reproductive cells, called gametes, are made by cells that can swim.
the male and female reproductive systems.

Male gametes are called sperm.

Tail/Flagellum
Head
Mid-piece

Mitochondria
Centeiole Acrosome
Nucleus
Axoneme
Sperm are transported in a fluid called semen which
Female gametes are called ova, or eggs. contains millions of sperm and nutrients that provide
the sperm with energy.
Key Concept

What are the Reproductive Systems of Humans?
What does the Male Reproductive System do?

A sperm joins with an egg in a reproductive process
called fertilization.

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