I hope this helps with your work :)
Based on what i know of bats they have echo location to help them navigate were they are going and the echo location helps them to find food.a special feature that they have to help them survive is their hearing do to their lack of eye sight they compensate with unnatural hearing.
Cytoplasm is the answer you are looking for. hope this helps
This describes the function of the capillaries. Capillaries are the smallest of the body's blood vessels. They are one cell thick, and are the sites of the transfer of oxygen and other nutrients from the bloodstream to other tissues in the body. Additionally they collect carbon dioxide, waste materials and fluids for return to the veins. They connect the tiny muscular branches of arteries called arterioles, with tiny veins called venules.