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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 ograns that work together to perform a major function |
| Gland | An organ that prouduces and releases chemicals either through ducts or into the bloodstream |
| Hormone | the chemical produced by an by an endocrine gland |
| Stress | the reaction of a person´s 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 nutrients molecules |
| Nutrients | The substances in food that provides the raw materials the body cells need to carry out |
| 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 moved food through the esophagus toward the stomach |
| saliva | fluid released from in the mouth that play an important role in mechanical and chemical diegstion |
| Enzymes | protenis that speed up chemical reaction in the body |
| Elimination | Act of removal of materials from the body |
| Circulatory | An organ system that transport needed materials to cells and removes waste |
| 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 exchange between 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 gasses 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 through the nervous system |
| Synapse | the junction where one neuron can transfer an impulse to another neuron |
| Impulse | the message carried by a neuron |
| spinal cord | thick column of nervous tissue that links the brian to most of the nerves that branch controls out of the body |
| Reflex | automatic response that occurs without conscious control through the somatic nevrous system |
| Negative feedback | the process by which a system is turned off by the condition it produces |
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