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The Use of Email Should Be Avoided in Situations When

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The use of email should be avoided in situations when


Definitions:

Pulmonary Semilunar Valve

A heart valve that prevents backflow of blood from the pulmonary artery into the right ventricle.

Capillaries

Tiny blood vessels that facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrient and waste chemical substances between blood and surrounding tissues.

Oxygen

A chemical element (O) that is critical for respiration in most aerobic organisms and has various industrial uses.

Nutrients

Substances obtained from food and beverages that are essential for growth, metabolism, and for maintaining life.

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