The best answer for the blood vessels' valves would be these are veins that would then help in preventing the back flow of blood because the walls have small muscle to pump the blood back to the heart.Hope this is the answer.
Answer:
30
Explanation:
if you do more, you could overwork your body
Answer:
Financial barriers (such as lack of insurance, deductibles and copayments, and lack of coverage for preventive care) are associated with higher rates of under use of needed services and with poorer health outcomes.
Explanation:
google lolll
