Sorry if I’m wrong but I believe it’s the cardiovascular and lymphatic system
Hope this helps!
Answer:
Cellular respiration takes place in mitochondria of a cell, hence it is also known as power house of cell , because it gives us energy in the form of ATP molecule .
A normal heart rate ranges between 60-100 beats per minute. The higher the heart rate is, the faster the blood is pumping through the heart. When exercising a persons heart will be higher because the brain and the muscles in the body are in need of oxygen so the heart needs to pump faster in order to sustain optimal performance.<span />
Decrease in the tree population can damage the environment.
The opportunistic has a longer lifespan than the equilibrium populations
