The scientific study of an organism’s vital functions, including growth and development, the absorption and processing of nutrients, the synthesis and distribution of proteins and other organic molecules, and the functioning of different tissues, organs, and other anatomic structures. Physiology studies the normal mechanical, physical, and biochemical processes of animals and plants.
physiology to learn more about many different organ systems, including:
The cardiovascular system — your heart and blood vessels
The digestive system — the stomach, intestines, and other organs that digest food
The endocrine system — glands that make hormones, the chemicals that control many body functions
The immune system — your body’s defense against germs and disease
The muscular system — the muscles you use to move your body
The nervous system — your brain, spinal cord, and nerves
The renal system — your kidneys and other organs that control the fluid in your body
The reproductive system — sex organs for men and women
The respiratory system — your lungs and airways
The skeletal system — bones, joints, cartilage, and connective tissue
For each system, physiology sheds light on the chemistry and physics of the structures involved.
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