Organ System Overview Integumentary System The integumentary (in-teg0u-men-tar-e) system is the external covering of the body, or the skin. It waterproofs the body and cushions and protects the deeper tissues from injury. It also excretes salts and urea in perspiration and helps regulate body temperature. Temperature, pressure, and pain receptors located in the skin alert us to what is happening at the body surface. Skeletal System The skeletal system consists of bones, cartilages, ligaments, and joints. It supports the body and provides a framework that the skeletal muscles use to cause movement. It also has a protective function (for example, the skull encloses and protects the brain). Hematopoiesis (hem0ah-to-poi-e-sis), or formation of blood cells, goes on within the cavities of the skeleton. The hard substance of bones acts as a storehouse for minerals. Muscular System The muscles of the body have only one function—to contract, or shorten. When this happens, movement occurs. Hence, muscles can be viewed as the “machines” of the body. The mobility of
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This note was uploaded on 11/08/2011 for the course BIOLOGY BSC1086L taught by Professor Leostouder during the Fall '10 term at Broward College.