The circulatory system delivers oxygen and nutrients to cells and takes away wastes.
Air pollution can negatively affect climate and health.
I guess it is <span>It makes your heart beat faster to supply more oxygen, which makes the heart stronger and enables it to pump blood more efficiently because aerobic exercise require oxygen.</span>
Answer:
Replace neurons damaged by spinal cord injury, stroke, Alzheimer's disease, Parkinson's disease or other neurological problems
Explanation:
