I assume the answer is man-made, correct?
Collagen is single most abundant body
I’m pretty sure the answer is C
Your pulse, is both at rest during exercise, this can reveal a heart attach and your aerobic capacity. Correct me if I'm wrong;)
A. Multiple organ systems working together
Explanation:
All of the organ systems work together to maintain homeostasis in humans because each system does something different. For example, the circulatory system delivers oxygen rich blood to the bones and the bones create new blood cells. When one thing is wrong with one system, it affects all of the systems, like a disease. Another example of this would be the central nervous systems and endocrine working together to coordinate messages to the brain about the body's state while resting and exercising to maintain homeostasis.
