What is the reproductive system?
Where are the ovaries located?
What is a uterus?
What are sperm cells made of?
Why don’t men have babies?
Why do people reproduce?
Why are there two different genders? Why not only girls or only boys?
What happens to sperm cells that don't reach the egg?
Why can only one sperm cell enter an egg cell during sexual intercourse?
Here are some questions about this topic.
Click the question to read the answer!
Ask another question about this topic!
See a Full List of Topics
© 1999–2014 BrainPOP and related companies. All rights reserved.
BrainPOP is a registered trademark of FWD Media Inc. d/b/a BrainPOP.
For the full list of trademarks referenced on this page, please see
. Your use of the site indicates your agreement to
be bound by our