Take a deep breath. where does that air you breath in go? it goes into your lungs, but that's not the end! your circulatory system to move the oxygen to all of your cells. what carries the oxygen to every cell in your body?
a) blood
b) food
c) heart
d) veins

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed