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>
CORNEA of the eye remains same throughout our life span
Hi !
A disorder of the shoulder joint and its capsule, which then becomes inflamed and
stiff or frozen, is called:
<em>d. adhesive capsulitis.</em>
False, many legal medications have side effects and risks
