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human body system
| Term | Definition |
|---|---|
| tissue | a group of similar cells that perform a specific |
| organ | a body structure that is composed or 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 produces and releases chemicals either through ducts or into the bloodstream |
| hormone | 1 the chemical produced by an endocrine gland 2 a chemical that effects growth and development |
| stress | the reaction of a persons body to potentially threatening challenging or disturbing |
| interactions | 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 molecules |
| nutrients | The substance in food that provides the raw materials the body's cells 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 blood |
| Carbohydrates | A energy-rich organic compound such as Suger or starch |
| peristalsis | waves of smooth muscle contraction that move food through the esophagus toward the stomach |
| saliva | fluid released from glands in the mouth that play an important role in mechanical and chemical digestion |
| enzymes | proteins that speed up chemicals reactions in a body |
| elimination | act of removal of materialls in the body |
| cicullatory 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 carres blood back to the heart |
| capillary | a tiny blood vessel where substances are exchanged between the blood and body cells |
| lymph | fluid that travels throght the lymphatic system consisting of water white blood cells and dissolved materials |
| bronchi | the two passages that direct air into the lungs |
| alveoli | tiny thin walled sacs of lung tissue specialized for the movement of gases between air and blood |
| excretion | the process of moveing water |
| nephron | small filtering structer in the kendneys that removes waste from the blood and produses urine |
| neuron | a cell that carries imformation throght the nervese system |
| synapse | the juction where one neuron can transfur an impulse to another neuron |
| impulse | the message carried by a neuron |
| brain | the part of the centraile nervous system that is located in the skull and cuntrols most functions of a body |
| spinal cord | thick columm of a nerouse tisses 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 whitch a system is turned off by the condition it produces |
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