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Integumentary system
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Forms the external body covering; protects deeper tissue from ingury; synthesizes vitamin D;location of cutaneous(pain. pressure, etc.) receptors; and sweat and oil glans.
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Skeletal system
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Protects and supports body organs; provides a framework the muscles use to cause movement; blood cells are formed within bones; stores minerals.
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Muscular system
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Allows manipulation of the environment, locomotion, and facial expression; maintains posture; produces heat.
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Nervous system
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Fast-acting control system of the body; responds to internal and external changes by activating appropriate muscles and glands.
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Endocrine system
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Glands secrete hormones that regulate processes such as growth, reproduction, and nutrient use (metabolism) by body cells.
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Cardiovascular system
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Blood vessels transport blood, which carries oxygen, carbon dioxide, nutrients, waste, etc.; the heart pumps blood.
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Lymphatic system
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Picks up fluid leaked from blood vessels and returns it to blood; disposes of debris in the lymphatic stream; houses white blood cells involved in immunity.
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Respiratory System
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Keeps blood constantly supplied with oxygen and removes carbon dioxide; the gaseous exchanges occur through the walls of the air sacs of the lungs.
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Digestive system
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Breaks food down into absorbable units that enter the blood for distribution to body cells; indigestible foodstuffs are eliminated as feces.
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Urinary system
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Eliminates nitrogenous wastes from the body; regulates water, electrolyte, and acid-base balance of the blood.
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Male and Female repoductive system.
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Overall function of the reproductive system is production of offspring. Testes produce sperm and male sex hormone; ducts and glands aid in delivery of viable sperm to the female reproductive tract. Ovaries produce eggs and female sex hormones; remaining structures serve as sites for fertilization and development offetus. Mammay glands of female breast produce milk to nourish the newborn.
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