Answer:
9 brains
Explanation:
No explanation, but you can fact check this by looking it up :)
A skeleton is the hard structure that protects the internal organs of a living thing.
Explanation:
The skeletal system is an organ system that serves as the framework of the body of an organism.
I am sure the answer is A.
Oxygen is transported by blood to the heart where it is used to break down sugar into water, carbon dioxide, and usable energy
