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human body systems
| Term | Definition |
|---|---|
| Tissue | A group of similar cells that perform a particular function |
| Organ | A body structure that is composed of different kinds of tissue that works together |
| Organ system | a group of organs that work together to perform a function |
| Gland | An organ that produces in releases chemicals either through ducts or into the blood stream |
| Hormone | The chemical produce by and endocrine gland a chemical that affects growth and development |
| stress | The reaction of a person's body to potentially threatening challenging 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 nutrients molecules |
| Nutrients | The substance in food that provides the raw materials the body cells need to carry out all their essential process |
| Absorption | The process by which nutrients molecules pass through the wall of the digestive system into the blood |
| Carbohydrates | An energy rich organic compound such as sugar or starch that is made of the element carbon hydrogen and oxygen |
| Peristalsis | Ways of a smooth muscle contractions that move food through the esophagus towards the stomach |
| Saliva | Fluid released from glands in the mouth that play an important role in mechanical and chemical digestion |
| Enzymes | Protein 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 |
| 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 exchanged between the blood and the 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 sacks of lung tissue specialized for movement of gases between air and blood |
| Excretion | The process of moving wastes |
| Nephron | Small filtering structure in the kidney that removes waste from blood and produces urine |
| Synapse | The Junction where one neuron can transfer impulse to another neuron |
| Impulse | The message carried by a neuron |
| Brain | The part of the central nervous system that is located at the school and controls 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 system |
| Negative feedback | The process by which a system is turned off by the condition it produces |
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