Subscribe Nowīeyond these similarities, however, lie some profound differences. Get a Britannica Premium subscription and gain access to exclusive content. For example, see abdominal cavity adrenal gland aorta bone brain ear eye heart kidney large intestine lung nose ovary pancreas pituitary gland small intestine spinal cord spleen stomach testis thymus thyroid gland tooth uterus vertebral column. Many entries describe the body’s major structures. For information on the structure and function of the cells that constitute the body, see cell.
For a description of how the body develops, from conception through old age, see aging growth prenatal development human development.įor detailed coverage of the body’s biochemical constituents, see protein carbohydrate lipid nucleic acid vitamin and hormone.
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For detailed discussions of specific tissues, organs, and systems, see human blood cardiovascular system digestive system, human endocrine system, human renal system skin human muscle system nervous system reproductive system, human respiration, human sensory reception, human skeletal system, human. Human anatomy and physiology are treated in many different articles. Human body, the physical substance of the human organism, composed of living cells and extracellular materials and organized into tissues, organs, and systems. The nine major organ systems in the human body are the integumentary system, the musculoskeletal system, the respiratory system, the circulatory system, the digestive system, the excretory system, the nervous system, the endocrine system, and the reproductive system. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.
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