Answer:A bat has a much more flexible wing structure. It is very much like a human arm and hand, except it has a thin membrane of skin (called the patagium) extending between the "hand" and the body, and between each finger bone. Bats can move the wing like a hand, essentially "swimming" through the air.
Explanation:
Answer:
Energy comes from foods rich in carbohydrate, protein and fat.
Explanation:
The source of energy that is used to power the movement of contraction in working muscles is adenosine triphosphate (ATP), the body's biochemical way to store and transport energy.
