click below
click below
Normal Size Small Size show me how
Human Body systems
Term | Definition |
---|---|
Tissue | A group of similar cells that preform a specific function |
Organ | a body structure that is composed of different kinds of tissue that work together |
Organ system | a group of organisms that work together to preform 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 affects growth and development |
Stress | a reaction of a persons body to potentially threatening, challenging, disturbing events |
Interactions | the direct effect that one thing has on another |
Stable | resistant to sudden change |
Digestion | the process where 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 the 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 an oxygen |
peristalsis | waves of smooth muscle contractions 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 chemical reaction in the body |
Eliminations | The act of removal of materials from the body |
circulatory system | an organ system that transports 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 |
Vein | A blood vessel that carries blood back to the heart |
Capillary | A tiny blood vessel that carries blood 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 matterial |
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 wastes |
Nephron | small filtering structure in the kidneys that removes wastes from blood and produces urine |
synapse | the junction where one neuron can transfer an impulse to another neuron |
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 the branch throughout 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 |