The Digestive System.

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Presentation transcript:

The Digestive System

Function To break down foods into molecules small enough to be transported to and absorbed by cells (for cellular respiration!).

Noteworthy Mechanical Digestion vs. Chemical Digestion Ex: stomach acid Ex: chewing Ex: saliva

Noteworthy: Path of food: Mouth Esophagus Stomach Small Intestine Large Intestine Rectum Anus

Major Organs/Key Players Esophagus: Lined with smooth (involuntary) muscle to help send food to stomach. Wave like muscle contractions are called peristalsis.

Major Organs/Key Players The Small Intestine: Absorbing nutrients Villi: folds that increase surface area for absorption

Major Organs/Key Players The Large Intestine: Absorbing water

Major Organs/Key Players accessory organs help with digestion by releasing digestive enzymes and/or hormones. Salivary glands Pancreas Liver Gall bladder

Noteworthy: Labeling the parts:

Diseases Diarrhea Cause: -bacteria -parasite -virus Effect: Too much water in stool; dehydration

Diseases Heartburn Cause: Acid in stomach goes into esophagus Effect: Burning feeling in chest

Appendix Digestive System Brain Pop Appendix Digestive System

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