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human body system
human body syst
Term | Definition |
---|---|
tissue | a group of similar cells that perform a specific function |
organ | a body structure that is composed of 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 bloodstream. |
hormone | (1) the chemical produced by an endocrine gland (2) a chemical that affects growth and development. |
stress | the reaction of a person's body to potentially threatening, challenge, or disturbing events |
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 substances in food that provide the raw materials the body's cell 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 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 |
salivea | fluid released 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 transports needed materials to cells and removes waste. |
contracts | to draw together; to reduce in size. |
Artery | A blood vessel 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 | Fluid that travels through 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 moving waste. |
Nephron | Small filtering structure in the kidneys that removes wastes from blood and produces urine. |
Neuron | A cell that carries information though the nervous system. |
Synapse | The junction where one neuron can transfer an impulse to another neuron. |
Impulse | The massage carried by neuron. |
Brian | The part of the central nerveous system that is located in the skull and controls most functions of the body. |
spinal cord | thick column of nervous tissue that Links the brain to most of the nerves that branch out through the body. |
Reflex | Automatic response that occurs without conscious control through the somatic nerveous system |
Negative feedback | The process by which a system is turned off by the condition it produces |