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Human Body Datcks
| Term | Definition |
|---|---|
| tissue | a group of similar cells that performs a specific function |
| Organ | a body structure that is composed of different kinds of tissue that work together |
| Organ system | a group of organs that work together to perform a major function |
| Gland | an organ that produces and releases chemicals either though ducts or into the bloodstream |
| Hormone | (1) the chemicals produced by an endocrine gland (2) A chemical that affects growth and development |
| Stress | the reaction of a person s body to potentially threatening ,challenging , or disturbing events |
| Interactions | the directions effect that's 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 material the body's cells need to carry out of their essential processes |
| Absorption | the process by which nutrients molecules pass through the wall of the digestive system into blood |
| Carbohydrates | an energy-rich organic compound,such as sugar or starch,that is made of element of carbon,hydrogen and oxygen |
| peristalsis | waves of smooth muscles contractions that move food through the esophagus towards the stomach |
| saliva | fluid releases from glands 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 system | an organ system that's transports needed materials to cell 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's carries blood back to the heart |
| capillary | a tiny blood vessel where substance are exchanged between the blood and body cells |
| lymph | fluids that travel though the lymphatic system consisting of water,whit blood cells,and dissolved materials |
| bronchi | the two passage that direct air into lungs |
| alveoil | tiny-thinned walled sacs of lung tissue specialized for the movement of gases between air and blood |
| excretion | the process of moving wastes |
| neuron | small filtering structure in the kidneys that's removes waste form blood and produces urine |
| synapse | the junction where one neuron can transfer and impulse to another neuron |
| impulse | the message carried by a neuron |
| brain | the part of a central nervous system that's is located in the skull and controls most functions of the body |
| spinal cord | thick column of nervous tissue that's links to most of nerves that branch out through body |
| reflex | automatic response that occurs without conscious control though the somatic nervous system |
| negative feedback | the process by which a system is turned of by the conditions it produces |
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