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Human Body System
Human body system PT.1
| 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 produced and releases either through ducts or into bloodstream |
| Hormone | 1) the chemical produced by an endocrine gland 2) A chemical that effects 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 has on another |
| Stable | Resistant to sudden change |
| Digestion | The process by which your body break down food into small nutrient molecules |
| Nutrient | 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 food |
| 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 stomach |
| Saliva | fluid released from gland 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 | 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 ad body cells |
| Lymph | Fluid that travels through the lymphatic system consisting of water, white blood cells, and dissolved material |
| Bronchi | The two passages that direct air into lungs |
| Alveoli | Tiny thin walled sacs of lung tissue specialized for the movement of gases between air blood |
| Excretion | The process of moving waste |
| Nephron | A small filtering structure in the kidneys that removes waste 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 |
| Brain | The part of the central nervous system that located in the skull and control most body 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 nervous system |
| Negative feedback | The process by which a system is turned off by condition it produces |
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