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Human Body systems
| Term | Definition |
|---|---|
| Tissue | a group of similar cell that perform a specific function |
| Organ | a body structure that is composed of different kind of tissues that work togeter |
| organ system | a group of organs that work together to perform a major function |
| Gland | an organ that produces and release chemicals either through ducts or into the bloodstream |
| Hormone | (1)the chemical produced by an endocrine gland (2) a chemical that affect growth and development |
| stree | 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 breaks down food into small nutrient |
| nutrient | the sudstances in food that provides the raw materials that body's cells need to carry out all their essential processes |
| absoroption | the process by which your body 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 move food through the esophagus toward the stomach |
| saliva | fluid released from gland into the mouth that plays an important role in mechanical and chemical digestion |
| enzymes | proteins that speed up chemical reactions in the body |
| elimination | act removal of materials from the body |
| circulatory system | 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 exchanged between the blood and the blood 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 and blood |
| alveoli | tiny thin-wall sacs of lung tissue specialized for the movement of gases between air and blood |
| excretion | the process of moving of waste |
| nephron | small filtering structure in the kidneys the 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 controls most functions of the body |
| spinal cord | thick column or nervous tissue that links that 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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