The oxygen-binding protein found in muscle cells is myoglobin.
I think he is applying the principle of adaptation
Answer:
Initial support provided to someone who has suddenly fallen ill or become injured. Temporary help until full medical treatment is available.
Explanation:
Let's pick your role as a son/daughter, friend, and pupil.
When you're at home with your parents and talk to them, do chores, eat breakfast together, etc. you're playing the role of a son or daughter.
When you're hanging out with your friends, doing random stuf, having a good time, your're assuming your role as a friend.
When you're at school, studying, attending a lecture and listening to your teacher, you're assuming your role as a pupil.
To stretch your muscles out before exercise. to prevent the damage of muscles or other tissues. <span />