{{stub}}[[organism]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
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{{stub}}Physiology is the study of how organs function in an[[organism]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
Educational Ministries, Inc. 1998</ref>
Educational Ministries, Inc. 1998</ref>
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==Human physiology: Eleven systems==
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Human physiology and anatomy classifies organs into eleven systems. They are Circulatory, Immune/Lymphatic, Skeletal, Muscular, Digestive/Excretory, Endocrine, Respiratory, Reproductive, Nervous/Sensory, Integumentary, and Urinary. Some physicians consider the nervous and sensory to be two distinct systems, and consider the skeletal and muscular as one (the Skeletomuscular), thus retaining the number of eleven systems total.