We get tired after exercise because our muscle fibers get tired very quickly. This is due to the major source of energy for the muscle tissue, called adenosine triphosphate, or ATP. As the muscles make use of this supply of energy, they get tired and fatigue.
Answer:B
Explanation:
he will loose weight because he eats 2,000 calories and burns 450 2,000- 450 =1550 it used to be 1780
Answer:
respiratory
Explanation:
oxygen goes in carbon dioxide goes out
Answer:
HPV: Human Papilloma Virus