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Integumentary System
- forms the external body covering
- protects deeper tissues from injury
- synthesizes vitamin D
- houses cutaneous (pain,pressure) receptors and sweat and oil glands
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Skeletal System
- protects and supports body organs
- provides a framework the muscles use to cause movement
- blood cells are formed within bones
- bones store minerals
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muscular system
- allows manipulation of the environment, locomotion, and facial expression (allows us human motion)
- maintains posture and produces heat
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nervous system
- the fast-acting control system of the body (instantaneous reactions)
- responds to internal and external changes by activating appropriate muscles and glands
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endocrine system
- glands secrete hormones that regulate processes such as growth, reproduction, and nutrient use (metabolism) by body cells
- hormones tend to affect other hormones
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lymphatic system/immunity
- picks up fluid leaked from blood vessels and returns it to blood
- houses white blood cells (lymphocytes)
- immune response mounts attacks against foreign substances
- disposes of debris in the lymphatic system
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digestive system
- breaks down food into absorbable units that enter the blood for distribution to body cells
- indigestible foodstuffs are eliminated as feces
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male and female reproduction systems
- overall function: production of offspring
- testes: produce sperm and male sex hormone
- male ducts and glands aid in delivery of sperm to the female reproductive tract
- ovaries: produce eggs and female sex hormones
- remaining female structures serve as sites for fertilization and development of the fetus
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