Biology: Human Anatomy, Physiology, and Digestive System | Complete Key Concepts and Definitions

Biology: Human
Anatomy, Physiology,
and Digestive System
Key Concepts

, Anatomy study of the structure of an organism kr kr kr kr kr kr




Physiology The study of body function kr kr kr kr




Variable A factor that can change in an experiment
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Experimental Group the group in an experiment that receives the variable being tested kr kr kr kr kr kr kr kr kr kr kr




Control Group kr




In an experiment, the group that is not exposed to the treatment; contrasts with the experi
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mental group and serves as a comparison for evaluating the effect of the treatment.
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Homestasis maintaining the stable narrow range of the internal environment kr kr kr kr kr kr kr kr




Feedback mechanism Homeostatic mechanisms that maintain internal constancy
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negative feedback kr Last Step stops or slows the First Step of a Series
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positive feedback kr Last Step increases an Earlier Step of a Series
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cell Basic unit of living things kr kr kr kr




tissue A group of similar cells that perform a specific function.
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organ A group of tissues that form a structure to perform a specific function
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organ system A team of organs that work together
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Systems of the body Integumentary - kr kr kr kr




skin. Important because it gives you protection against germs.
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Digestive - Stomach, large intestines, small intestines. Allows for break down of food for energy
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Circulatory - kr




heart, veins, blood vessels. The heart helps with blood flow, veins pushing oxygenated blood to oth
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er parts of the body away from the heart and bloods vessels pulling in deoxygenated blood to the lu
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ngs where it gets breathed out.
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Skeletal - bones. Aids with structure, protection and movement of the body.
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Respiratory - lungs. Brings O2 in, releases CO2. kr kr kr kr kr kr kr kr




Excretory - kidney, bladder. Removal of metabolic waste from the body.
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Immunity - WBC. Defends against pathogens. kr kr kr kr kr kr




Nervous - Brain, spinal cord, nerves. Coordinate body movement, homeostasis.
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Endocrine - Pancreas, adrenal gland. Same process as nervous system.
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