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human body system
human body syst
| Term | Definition |
|---|---|
| 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 bloodstream. |
| hormone | (1) the chemical produced by an endocrine gland (2) a chemical that affects growth and development. |
| stress | the reaction of a person's body to potentially threatening, challenge, 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 nutrient molecules |
| nutrients | the substances in food that provide the raw materials the body's cell need to carry out all their essential processes. |
| absorption | the process by which nutrient molecules pass through the wall of the 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 |
| salivea | 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 waste. |
| contracts | to draw together; to reduce in size. |
| Artery | A blood vessel 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 substance 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 waste. |
| Nephron | Small filtering structure in the kidneys that removes wastes from blood and produces urine. |
| Neuron | A cell that carries information though the nervous system. |
| Synapse | The junction where one neuron can transfer an impulse to another neuron. |
| Impulse | The massage carried by neuron. |
| Brian | The part of the central nerveous 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 nerveous system |
| Negative feedback | The process by which a system is turned off by the condition it produces |
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