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Human Body Systems
Question | Answer |
---|---|
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 |
Glad | an organ that produces and releases chemical either trough ducts or into the bloodstream |
Hormone | the chemical produced by an endocrine gland 2 A chemical that affects growth and development |
Stress | the reaction of a persons body to potentially threatening challenging,or distrubing 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 subtances in food that provide the raw materials the body's cells need to carry out all their essential processes |
Absorption | The process by which nutrients molecules pass trough the wall of the digestive system into blood |
Carbohydrates | a energy-rich organic compound,such as sugar or starch,that is made of elements carbon,hydrogen and oxygen |
peristalsis | waves of smooth muscle cantarctions that move food trough the esophagus toward the stomach |
saliva | fluid released from glands in mouth that play an important role in mechanical an chemical digestions |
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 transport needed materials to cell and removes waste |
Contract | to draw together,to reproduce size |
Artery | a blood vessel that carriers blood away from heart |
Vein | A blood vessel that carriers blood back to the heart |
Capillary | A tiny blood vessel where substances are exchanged between the blood and body cell |
Lymph | Fluid that travels through the lymphatic system consisting of water ,white blood cell,and dissolved materials |
Bronchi | the two passages that direct air into the lugs |
Alveoli | tiny thin -walled sacs of lug tissue specialized for the movement of gases between air and blood |
Excretion | the process of moving wastes |
Nephron | small filtering structure in the kidneys that removes |
Neuron | a cell that carriers information through the nervous system |
Synapse | the junction where on neuron can transfer an impluse to another neuron |
Impulse | the message carried by a neuron |
Brain | the part of the central nervous system that is located 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 | the process by which a system is turned off by the condition it process |