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metabolism unit
| Term | Definition |
|---|---|
| metabolism | the body's use of molecules for energy and growth |
| glucose | a molecule that organisms can use to release energy, and that is made of carbon, hydrogen, and oxygen atoms |
| oxygen | a molecule that organisms get from the air or water around them and use to release energy |
| amino acids | molecules that are building blocks of proteins |
| system | a set of interacting parts forming a complex whole |
| digestive system | the body system that takes in food and breaks it down |
| respiratory system | the body system that takes in oxygen and releases carbon dioxide |
| circulatory system | the body system that transports molecules to and from all cells of the body |
| energy | tha ability to make things move or change |
| protein | a category of large molecules that preform important functions inside living things |
| starch | a type of energy storage molecule made of many glucose molecules connected together |
| tissue | a group of cells that work together to perform a specific job |
| heart | muscular organ that pumps blood throughout the body |
| arteries | blood vessels that carry oxygen rich blood from the heart to the body |
| veins | blood vessels that return oxygen poor blood back to the heart |
| capillaries | tiny blood vessels where the exchange of oxygen, carbon dioxide, nutrients and waste accurs between the blood and the cells |
| circulation | movement of blood through the heart and blood vessels, delivering oxygen and nutrients to the body, and removing waste products |
| lungs | main organ of the respiratory system where gas exchange occurs |
| diaphragm | muscular structure that separates the chest cavity from the adominal cavity and plays a key role in breathing |
| alveoli | tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide take place |
| ingestion | process of taking food into the body |
| digestion | process of breaking food down into it's smallest parts |
| respiration | process by which oxygen is taken in and carbon dioxide is released by an organism |
| excretion | to remove waste |
| homeostasis | the body's ability to remain a stable environmental, even when external conditions change |
| voluntary | you need to decide on the action (think it) before it happens, done by choice |
| involuntary | happens without you thinking about doing it, occurs automatically |
| smooth muscle | type of muscle found in internal organs that operates involuntarily (you doon't have to think about it, it just happens) example the muscle that makes up the esophagus |
| cardiac muscle | type of muscle tissue that makes up the heart and operates involuntarily (you don't have to think about it for it to happen) |
| cellular respiration | the chemical reaction between oxygen and glucose that release energy into cells |
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