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chemical formed in one tissue or organ and carried by the blood to stimulate or inhibit a function of another tissue or organ
the constantly changing physical and chemical processes occurring in the cel that are the sum of anabolism and catabolism
thin, circular bone embedded in the patellar tendon in front of the knee joint, also called the knee cap
substance that surrounds and protects cells, is manufactured by the cells, and holds them together
clear fluid collected from body tissues and transported by lymph vessels to the venous circulation
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