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human body system
| Term | Definition |
|---|---|
| tissue | a group of similar cell that perform a specific function |
| organ | a body structure that is composed of different kinds of tissues that work together |
| organ system | a group o organs that work together to perform a major function |
| Gland | an organ that produces and release chemicals either through ducts or into the blood system |
| hormone | (1) the chemicals produced by an endocrine gland (2) A chemical that affects the growth and development |
| stress | the reaction of a persons body to potentially threatening challenging, or disturbing event |
| 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 nutrient molecules |
| absorption | The process by which nutrient molecules pass through the wall of the digestive system into 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 p chemicals reaction in the body |
| elimination | act or removal or materials from the body |
| circulatory system | an organ system that transports needed materials to cells and removes waste |
| contact | 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 material |
| bronchi | the two passages that direct air into lungs |
| alveoli | tiny thin-walled sacs of lung tissue specialized for the movement of gases between air and blood |
| excretion | the process of moving waste |
| nephron | small filtering structure in the kidney that removes waste from blood and produces urine |
| neuron | a cell that carries through the nervous system |
| synapse | the junction where one neuron can be transfer an impulse to another neuron |
| impulse | the massage carried by a neuron |
| brain | the part of the central nervous system that is located in the skull and controls most functions o the body |
| spinal cord | thick column of nervous tissue that links the brain to most of the nerves that branch branch out through the body |
| reflex | m |
| negative feedback |
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