Which of the following is not a part of the male reproductive system?
Penis
Testes
Uterus
Which of the following is not a part of the female reproductive system?
Ovary
Vagina
Sperm duct
What is ovulation?
The release of a mature egg cell
The loss of the lining of the uterus
The joining of a male sex cell and a female sex cell
What substance passes through the placenta to the baby?
Oxygen
Carbon dioxide
Blood
About how long does the menstrual cycle take?
About 5 days
About 14 days
About 28 days