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human body systems
| Term | Definition |
|---|---|
| Tissue | a group of cells that preforms 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 preform a major function |
| gland | an organ that produces and releases chemicals either through duc |
| hormone | he chemical produced by an endocrine gland a chemical that affects growth |
| stress | the reaction of a person's body to potentially threatening |
| interactions | the direct effect that one thing has on another |
| stable | resistant to sudden change |
| Digestion | the process by witch your body breaks down food into small nutrient molecules |
| nutrients | the substance in food that provide the raw materials the body's cells need to carry out all their essential process |
| absorption | the process by which nutrient molecules pass through the wall of digestive system into the blood |
| Carbohydrates | A energy rich organic compound such as sugar or starch that is made of elements Carbone hydrogen and oxygen |
| Peristalsis | Waves of smooth muscle contractions that move food through the esophagus towards the stomach |
| Saliva | Fluid release from glands in the mouth that play an important role in mechanical and chemical digestion |
| Enzymes | Proteins the 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 |
| Contract | To draw together to reduce in size |
| Artery | A blood vessel that carries blood away from the heart |
| Vain | 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 lymphatic systems consisting of water white blood cells and dissolved materials |
| Brunchi | 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 and the kidneys that remove waste from blood and produces urine |
| Neutron | A cell that carries information throughout the nervous system |
| Synapse | The Junction where one Neutron can transfer an Impulse to another Neutron |
| Impulse | The message carried by a neutron |
| Brain | A part of the central nervous system that is located in the school and controls most functions of the body |
| Spinal cord | Thick column of nervous tissue that links the brain to the most nerves the branch out throughout the body |
| Reflex | Automatic response that occurs without conscious control throughout the somatic nervous system |
| Negative feedback | The process by which a system is turned off by condition of produces |
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