Answer:
The baby starts breathing
Explanation:
While in the womb, a fetus has its oxygen delivered to it, and the waste products removed (all via the mother's bloodstream), so there is no reason to separate all the chambers of the heart while still in the womb.
However, once the baby is born and it is breathing, the chambers need to differentiate in order to allow the blood to reach the lungs, and the oxygenated blood and deoxygenated blood do not mix.
Because when walking away it shows the other person that you dont care what they think/feel so the stop trying to impress.
The seminal vesicle adds a sugary, rich, and nutritious fluid to sperm.
