I am not sure because there may be more context, but here is what I am guessing the answer is.
As Bryson pedaled uphill both his heartbeat and breathing rate increased. His breathing rate increases to provide the body (more specifically, exercising muscles) with oxygen at a higher rate and his heart rate increases to deliver the oxygen (and glucose) to the respiring muscles more efficiently.
Answer: the heart pumps blood throughout the body through arteries, vessels, and veins.
Explanation:
Answer:
hmm.......................
A common human child, they grow from a infant to a teen and go through changes.. Or maybe a plant they go from a seed then develop into a small plant then grow bigger as long as their life continues.
