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The Digestive System
FunctionTo break down foods into molecules small
enough to be transported to and absorbed by cells (for cellular respiration!).
NoteworthyMechanical Digestion vs. Chemical Digestion
Ex: stomachacid
Ex: chewing
Ex: saliva
Noteworthy:Path of food:1. Mouth2. Esophagus3. Stomach4. Small Intestine5. Large Intestine6. Rectum7. Anus
Major Organs/Key PlayersEsophagus: Lined with smooth (involuntary) muscle to help send food to stomach. Wave like muscle contractions are called peristalsis.
Major Organs/Key PlayersThe Small Intestine:Absorbing nutrients
Villi: folds that increase surface area
for absorption
Major Organs/Key PlayersThe Large Intestine:Absorbing water
Major Organs/Key Playersaccessory organs help with digestion by releasing digestive enzymes and/or hormones. - Salivary glands- Pancreas- Liver- Gall bladder
Noteworthy:Labeling the parts:
DiseasesDiarrhea
Cause: -bacteria-parasite-virus
Effect: Too much waterin stool; dehydration
DiseasesHeartburn
Cause: Acid in stomach goes intoesophagusEffect: Burningfeeling inchest
Brain Pop
• Appendix• Digestive System