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Human Body Systems

TermDefinition
Tissue A group of similar cells that perform a specific function.
Organ A body structure that is composed of different kinds of tissues that work together.
Organ System A group of organs that work together to perform a major function.
Gland An organ that produces and releases chemicals either through ducts or into the bloodstream.
Hormone ( 1) the chemical produces by an endocrine gland ( 2) A chemical that affects growth and development.
stress The reaction of a person's body to potentially threatening, challenging or disturbing events.
Interactions The direct effect that one thing has on another.
stable Resistant to sudden change.
Digestion The process by which your body breaks down food into small nutrients molecules.
Nutrients The substance in food that provide the raw materials the Body's cells need to carry out of their essential processes.
Absorption The process by which nutrients molecules pass through the wall of digestive system into the blood.
carbohydrates A energy-rich organic compound, such as sugar or starch, that is made of the elements carbon,hydrogen and oxygen.
peristalsis waves of smooth muscle contractions that move food through the esophagus toward the stomach.
saliva fluid released from glands in the mouth that play an important role in mechanical and chemical digestion.
Enzymes proteins that speed up chemical reactions in the body.
Elimination Act of removal of materials from the body.
circulatory system an organ system that transports needed materials to cells and removes.
contract to draw together, to reduce in size.
Artery a blood vessel that carries blood away from the heart.
vein a blood vessel that carries blood back to the heart.
capillary a tiny blood vessel where substances are exchanged between the blood and body cells
lymph fluid that travels through the lymphatic system consisting of water, white blood cells, and dissolved materials.
Bronchi the two passages that direct air into the lungs.
Alveoli tiny thin-walled sacs of lung tissue specialized for the movement of gases between air and blood.
Excretion the process of moving wastes.
Nephron small filter structure i the kidneys that removes waste from blood and produces urine
Neuron a cell that carries information through the nervous system
Synapse The junction where one neuron can transfer an impulse to another neuron.
Impulse the message carried by a neuron.
Brain the part of the central nervous system that is located in the skull and controls most functions of the body.
Spinal cord thick column of nervous tissue that links the brain to most of the nerves that branch out through the body.
Reflex automatic response that occurs without conscious control through the somatic nervous system.
Negative feedback the process by which a system is turned off by the condition it produces
Created by: user-1718392
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