How does the blood and the cardiovascular system the nervous system and the muscular system as well as the respiratory system all contribute to human respiration?
I just thought to give a simple answer with my little knowledge of anatomy and physiology.Blood should have that much of warmth to keep all live parts in a constant manner. Like the water of this...
The nervous system provides the nervous impulses to initiate a voluntary muscular contraction. The circulatory system provides the necessary oxygen and nutrients to fuel muscle contraction.
The cardiovascular system provides the needed blood flow to operate the respiratory system, while the respiratory system, cleans the blood and replenishes the blood oxygen level.