The second statement best explains the type of blood vessel and the function of these vessels' valves - <span>These are veins, which prevent the backflow of blood because the walls have little muscle to pump blood back to the heart.
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Veins are large blood vessels which carry blood back to the heart. <span>Veins have a system of valves to prevent back-flow.</span>
Answer:
Aerobic exercise
Explanation:
They can improve your cardiovascular health, help you control your weight and give you more stamina and energy. Examples of low-impact aerobic exercises that are easier on your joints include walking, bicycling, swimming and using an elliptical machine.
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The correct answer is early detection. It is because in order to prevent or develop certain diseases, the person should have an early detection or diagnosis in means of finding a cure or solution to the disease that one experience.
There muscles will keep moving and keep tiring till when they rest it increases there level
