1. I think it is bloodstream
2. I am not sure
Answer:
D is the answer to this question
Answer:
Why are muscle and fat levels the only factors influencing flexibility impacted by personal decisions? Age, gender, and joint structure cannot be changed. ... Muscle stiffness that reduces flexibility often results from the overuse of muscle, but inactivity also weakens muscles and can make them more susceptible to injury.
Answer:
the answer is sleep opnea
