Answer:
is part of the cardiovascular system;
pumps blood to the cells in the body works;
closely with the lungs
Explanation:
The heart is a muscle that pumps blood through the blood vessels and that is the essential function. It is the main and central organ of the circulatory system.
The heart weights between 200 and 425 grams. It is located between lungs, in the middle of the chest and it is divided into four chambers in humans, other mammals, and birds heart.
The answer to your question is B, Myosin and actin do not fully detach, so the muscle cannot relax.
Hope this helps!
weight training can build stamina, improves strength, makes you faster, and just overall boosts your health. some sports even use weight training as a practice. for example, boxing, football, rugby, etc.
I would say E as it has to do with nutrition and dietetics and they would be registered.
