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science vocab
Term | Definition |
---|---|
cells | tiny units that make up all living things |
organism | a living thing |
metabolism | the breaking down of food for energy |
system | parts working together for a specific purpose |
mechanical digestion | the physical process of breaking down food into smaller molecules |
chemical digestion | the chemical breakdown of food by enzymes and acids |
enzymes | substances used to chemically breakdown food into smaller pieces |
small intestine | organ in digestive system where food is broken down into the simplest molecules |
villi | structures in small intestine where nutrients are absorbed |
diffusion | the movement of molecules from an area of greater concentration to lesser concentration |
osmosis | the movement of water from an area of greater concentration to lesser concentration across a cell membrane |
cell membrane | a semipermeable membrane surrounding the cytoplasm of a cell |
cytoplasm | the water like material inside a cell |
plasma | clear portion of blood that carries nutrients and water |
pepsin | enzyme that is used to chemically break down protien |
stomach | digestive organ with an acidic environment where food is chemically and mechanically broken down |