The Answer would be the immune system
Answer:
The left side of the heart receives oxygenated blood from the pulmonary vein and pumps it into the aorta, while the right side of the heart receives deoxygenated blood from the vena cava and pumps it into the pulmonary vein. The pulmonary vein and aorta also have valves connecting them to their respective ventricle.
Explanation:
In prophase of mitosis the nuclear envelope breaks up
The hot air when come to close cold air forced to increase its speed
Which makes monsoon and also thunderstorm perform
