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digestive System
| Term | Definition |
|---|---|
| Digestion | Process by which foods are changed into usable forms. large pieces are broken down into smaller pieces |
| Peristalsis | food moves through the digestive tract by wavelike movements of muscles |
| Physical Digestion (Physical = Mechanical) | breaking of large pieces of food into smaller pieces of food. Teeth cut, tear, grind, & grind food |
| Chemical Digestion | process by which large food molecules are broken down into smaller molecules. Begins in mouth w/ saliva - enzymes |
| Enzymes | proteins that control chemical reactions - help digest food - each enzyme can only breakdown 1 specific type of food molecule |
| Mouth | Chemical & physical (mechanical digestion) |
| Stomach | J - shaped bag like organ - stores food, breaks down food - mechanical/ chemical digestion |
| gastric juices | contain HCL(kills bacteria & breaks down food), mucus(protects stomach wall), pepsin (makes food soft, only works w/HCL) |
| Chyme | thick liquid in stomach that is ready to be further digested in intestines |
| Small Intestine | long coiled tube, food moves through by peristalsis - most chemical digestion happens here (fats are digested only here) |
| Pancreas | releases digestive juices that changes starches, proteins, & fats into simpler forms |
| Liver | produces bile - green liquid - breaks down large drops of fat into smaller ones. |
| Absorption in Small Intestine | movement of food from digestive system (walls of small intestine - villi) to blood |
| Absorption Large Intestine | minerals & water absorbed into blood |
| rectum | storage of solid waste, elimination of waste |
Created by:
wflorek
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