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Unit 3: Respiratory & Digestive Systems

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Term
Definition
Mouth   This is where digestion starts; teeth chomp food into smaller pieces  
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Salivary Glands   Produce saliva  
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Esophagus   Connects the throat to the stomach  
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Stomach   Contains acid that dissolves food and kills harmful bacteria  
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Small Intestine   Absorbs the nutrients from the dissolved food  
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Large Intestine   Soaks up salt, water, and minerals from the leftovers  
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Rectum   Stores feces until it is ready to exit the body through the anus  
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Liver   A chemical processing factory that gets rid of toxins, makes bile, recycles old blood cells, makes digestive juices, and stores and makes sugar  
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Gallbladder   Stores bile until it goes to the small intestine  
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Pancreas   Makes enzymes that help digest your food, and makes insulin to control blood sugar levels  
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Appendix   Might store good bacteria that help us digest our food  
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Pharynx   Throat  
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Trachea   Carries air from the pharynx to the bronchi in the lungs  
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Bronchi   Take air from the trachea to the left and right lungs  
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Alveoli   Tiny air sacs in the lungs where oxygen and carbon dioxide are put in and taken out of the capillaries  
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Bile   Chemical produced by the liver that helps your body break down fats  
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Enzyme   Special chemicals that help your body break down food  
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Pepsin   Enzyme in the stomach that helps break down food, especially proteins. Can work in the stomach acid.  
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Villi   Located in the small intestine; absorb nutrients and transfer them to the bloodstream; increase the surface area of the small intestine  
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