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human body system
| Term | Definition |
|---|---|
| tissue | a group of similar cells that perform a specifict 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 major function |
| gland | an organ that produces and releases chemicals either through ducts or into the bloodstream |
| hormone | (1)the chemical prouduce by an endociren gland (2)a chemical that effects growth and development |
| streess | the reaction of a person's body to potentially theatening challenging,or disturbing events |
| interactions | the direct effect that one thing has on another |
| stable | resiant to sudden change |
| digestion | the process by which your body breakes down food into small nutirients molecules |
| nutrients | the substance in food that provide that raw materials the body's cells need to carry out all their essential proucesses |
| absorpption | the proucess by wich the nuterient molecules pass through the wall of the digestive system into the blood |
| carbohydrates | a energy-rich organic compound,such as sugar or strach,that made of the elements carbon,hydrogen and oxygen |
| peristalsis | waves of smooth musscle contractions that moves food through the esophagus toward the stomach |
| saliva | fluid released from glands in mouth that play an important role in machanical and chemical digistion |
| enzymes | proteins that spees up chemical reactions in the body |
| elimination | act of removal of materials from the body |
| circulatory system | an organ system that transport 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 carries blood back to the heart |
| capillary | a tiny blood vessel where substance are exchanged between the blood and body cells |
| lymph | fludi that travels through the lymphatic system consisting of water,white blood cell,and dissolved materials |
| bronchi | the tow passages that direct air into the lungs |
| alveoli | tiny thin-walled sacs of lungs tissue specialized for the movement of gases between air and blood |
| excrection | the process of moving wastes |
| nephoron | small filtering structure in the kidneys that removes waste from blood and proudecses unirne |
| neuron | a cell that carries informstion through the nerous system |
| synapes | the junction where one neuron can transfer an impluse to another neuron |
| implus | the message carried by a neuron |
| brain | the part of the central nervous system that is located in the skull and controls most function of the body |
| spinal cord | thick colum of nervous tissue that links the brain to most of the nerves that branch out through the body |
| reflex | automatic response that occurs whithout conscious control through the somatic nervous system |
| negative feedback | the process by whivh a system is turned off by the condition it produces |
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