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human body system
Term | Definition |
---|---|
Tissue | a group of similar cells that perform 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 through ducts or into the bloodstream |
hormone | (1) the chemical produced by an endocrine gland (2) A |
Stress | The reaction of a person's body to potentially threatening changing |
Interaction | the direct effect that one thing has on another |
Stable: | 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 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 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: | Saliva: 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 |
Contract | Contract: to draw together; to reduce in size |
Vein: | a blood vessel that carries blood away from the heart |
Artery: | a blood vessel that carries blood away from the heart |
Capillary: | a tiny blood vessel where substances 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: | Excretion: the process of moving wastes Excretion:: small filtering structure in the kidneys that removes wastes from blood and produces urine Neuron:a cell that carries information through the nervous system Impulse: the message carried by a neuro |
Excretion: | small filtering structure in the kidneys that removes wastes from blood and produces urine |
Neuron: | a cell that carries information through the nervous system |
Impulse | the message carried by a neuron |
Brain: | the part of the central nervous 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 nervous system |
Negative feedback: | the process by which a system is turned off by the condition it produces |