Human Reproduction

The amniotic sac

• Is a fluid filled sac you can save after birth to use as a purse.

• Grows around the entire baby inside the uterus. It is filled with fluid that helps cushion and protect the growing embryo.

• A special baby carrier that grows on the outside of the mother during pregnancy.

During pregnancy, the placenta implants into the uterus and grows as a new organ. Its purpose is to

• nourish the embryo, get rid of waste, and keep mother's blood separate

• cushion and protect the baby

• produce extra chromosomes

Saving your gametes is for

• Females

• Males

• Neither

Which statements are true about human reproduction?

• Females are born with all of the eggs they will ever have.

• Once they reach puberty, males will continue to produce sperm for the rest of their lives.

• Once they reach puberty, a females body allows one egg cell to mature and release each month.

How many chromosomes do diploid human body cells have?

(a)  

How many chromosomes do haploid human sex cells (sperm and egg) have?

(a)