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>
Explanation:
Other exercises that can help improve cardiorespiratory fitness include:
1.running and walking
2. dancing.
3. jump rope.
4. Sports
Note: It is important to exercise to stay fit, heathly, and strong which can also keep you living longer and can keep cancer away for a long time.
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Answer:
Mescaline is considered a <em>"hallucinogenic" </em>drug because it results in profound alterations in sensory and perceptual experiences.
Answer:
You must reheat food to 165 when the entire mass of all cooked and refrigerated potentially hazardous food.
Explanation:
