The respiratory system brings air into the lungs supplying the blood with oxygen. Oxygen is carried throughout the body to the organs and keeps the heart pumping and when the blood circulates back to the lungs the process starts over again.
Answer:
the answer is B topographical
answer: in plant cells, it's usually to store in water and provide the plant support. in animal cells, it's to store the food.
<em>hope this helps! ❤ from peachimin</em>