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human body systems
| Term | Definition |
|---|---|
| Tissue | a group of similar cells that preform a specific function |
| organ | a body structure that is composed of different types of tissues that work together |
| organ systems | a group of organs that work together to perform a specific function |
| gland | an organ that produces and releases chemicals either through ducts or into the blood stream |
| hormone | 1 the chemical produced by an endocrine gland 2 a chemical that affects growth and development |
| stress | the reaction of a persons body to potentially threatening challenging or disturbing events |
| interactions | the direct effect that one has another |
| stable | resistant to sudden change |
| Digestion | the process by which your breaks down food into small nutrients molecules |
| nutrients | the substances found in food that in the raw materials |
| absorption | the process in which nutrients molecules pass through the wall of digestion system into blood |
| carbohydrates | an energy-rich compound such as sugar or starch that is made of elements carbon hydrogen oxygen |
| peristalsis | waves of smooth contractions that move food through the esophagus toward the stomach |
| saliva | fluid released from the glands in the mouth that play an important role in mechanical and chemical digestion |
| Enzymes | proteins that speed up chemical reaction |
| elimination | act of removal of materials from the body |
| circulatory systems | 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 body vessels |
| lymph | fluid that travel through the lymphatic system consisting of water white blood cells and dissolved materials |
| Bronchi | the two passages that direct air into the lungs |
| alveoil | 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 fitering structure in the kidneys that removes waste from blood and produces urine |
| neuron | a cell that carries information throughout 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 is located in the skull and controls most functions of the body |
| spinal chord | thick collum of nervous tissue that links to the brain most of the nerves branch though the body |
| Reflex | automatic response that occurs whithout conscious control through the somatic nervous system |
| negative feedback | the process of which the system is turned off by the condition it produces |
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