19 terms

Body Systems and functions

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Terms in this set (...)

Cell
the smallest unit of an organism that can perform life functions; may be specialized such as nerve, blood, or bone cells
Circulatory system
the body system responsible for carrying materials through out the body; major organs include heart, blood vessels
Respiratory system
the body system in which oxygen is brought into the body and carbon dioxide is released; major organs include nose, trachea, bronchi, lungs, diaphragm
Digestive system
the body system that takes in, breaks down, and absorbs nutrients that are necessary for growth and maintenance; major organs include mouth, esophagus, stomach, small intestines, large intestines, rectum/anus
Excretory system
the body system that helps rid the body of wastes, toxins, and excess water or nutrients; major organs include kidneys, ureters, bladder, urethra, skin, and lungs
Nervous system
the body system of specialized cells that carry messages throughout the body; directs behavior, movement, and processes of the body; major organs include brain, spinal cord, peripheral nerves
Muscular system
the body system that supports the body and enables it to move; major organs include skeletal muscles, smooth muscles, cardiac muscles
Skeletal system
the body system that protect and supports the body; major organs include the bones
Blood
Liquid that transports gases, wastes, and nutrients through the body
homeostasis
organisms maintain a relatively stable internal environment
gas exchange
taking in oxygen and breathing out carbon dioxide
digestion
breaking down food to get nutrients
transport
movement of molecules
blood vessels
tubes that contain blood (arteries, veins, capillaries, veins)
diffusion
movement of molecules across a cell membrane, from high to low concentration, without energy
absorb
obtain, take in (get from the outside environment)
excrete
remove, get rid of
maintain
keep or preserve
regulate
control

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