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Human Body System
| 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 | A organ that produces and releases chemicals either through ducts or into the 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 , challenging , or disturbing events. |
| Interaction | The direct effect that one thing hos 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 needs to carry out all their essential processes. |
| Absorption | The processes by which nutrient molecules pass through the wall of the digestive system. |
| Carbohydrates | A energy-rich organic compound , such as suger or starch , that is made of the elements carbon , hydrogen and oxygen. |
| Peristalsis | Waves of smooth muscles contractions that move food throughout the esophagus toward the stomach. |
| Saliva | Fluid release from glands into the mouth that plays 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 | In organ system that transports needed materials to the cell and removes waste. |
| Contract | To draw together and 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 wear 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 tissues especially for the movement of gases between air and blood. |
| Excretion | The process of moving waste. |
| Nephron | Small filtering structure in the kidneys that removes waist from blood and produces urine. |
| Neuron | A cell that carries information through the nervous system. |
| Synapes | The Junction where one neuron you 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 the most functions of the body |
| Spinal cord | Sick 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 systems. |
| Negative feedback | Be processed by which a system is turned off by the condition it produces. |
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