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an alkaline watery fluid containing digestive enzymes, which is secreted into the mouth by salivary glands.
a medical condition in which the body is unable to use its own insulin effectively.
the main vein that returns deoxygenated blood from the lower parts of the body to the right...
the spontaneous movement of molecules, atoms or ions, from an area of higher concentration to an...
neurons that transmit nerve impulses away from the central nervous system to the effectors.