Word Bank Anus Esophagus Gallbladder Large Intestine Liver Mouth Pancreas Salivary Glands Rectum Small Intestines Stomach Sponge 1 11 2 10 3 9 4 5 8 6 7

Salivary glands mouth esophagus liver stomach gallbladder pancreas Small intestines Large intestines rectum anus

Set up Cornell Notes on pg. 79 Topic: 32.2 Digestive System Essential Question(s): No EQ    32.2 Digestive System 2.1 Atoms, Ions, and Molecules

KEY CONCEPT The digestive system breaks down food into simpler molecules.

In 1822, Alexis St. Martin was shot in the stomach and treated by William Beaumont, an army surgeon The bullet had left a small hole in his stomach Beaumont persuaded St. Martin to let him observe the digestive process by tying foods to string, putting them into the stomach, and observing how the food was digested

The digestive system is a collection of organs that breaks down food into energy that can be used in cells mouth esophagus liver gallbladder large intestine small intestine rectum/anus

After digestion is complete, nutrients are absorbed and transported to all cells. Undigested materials are eliminated as liquid and solid wastes (urine/feces) mouth esophagus liver gallbladder large intestine small intestine rectum/anus

Digestion of carbohydrates begins in the mouth. Digestion of proteins occurs in the stomach. Digestion of fats and sugars occur in the small intestine.

Teeth: Mechanical digestion, shred and grind food Mouth Teeth: Mechanical digestion, shred and grind food Saliva: chemical digestion Enzyme: amylase (Am-uh-Lays) Breaks down starch into sugars Tongue: Keeps food positioned between teeth Digestion starts in the mouth!!!! stomach

Tube that connects mouth to the stomach Esophagus Tube that connects mouth to the stomach Peristalsis (pear-ih-stawl-sis) moves food through the organs esophagus muscles contract muscles relax food stomach

Stomach Muscular sac Holds up to 2 quarts of food Continues digestion Proteins are digested in the stomach Chyme: semi-liquid mixture of food 2-6 hours to digest food

Pancreas, Liver, and Gall bladder Aid in digestion Pancreas: helps digest fat, protein, and starches Liver: Produces bile which helps digest fats Gallbladder: stores bile liver stomach bile chyme bile enzymes gallbladder pancreas duodenum

Small Intestines Most digestion takes place in the small intestines Digests: Proteins Fats Sugars

Large Intestine, Rectum, Anus Large Intestine: helps to maintain the body’s fluid balance Absorbs water and salt Undigested material forms the solid feces. stored in rectum eliminated through anus

Sponge 1. What is the main function of the digestive system? 2. Describe how the mouth uses both mechanical and chemical digestion. 3. What three organs aide the small intestine with digestion? 4. If you ate a meal of spaghetti and meatballs, where would digestion of the pasta begin? The meat?

What is the main function of the digestive system? To break down food into smaller molecules for the body to absorb and use for energy. Describe how the mouth uses both mechanical and chemical digestion. Mechanical: teeth chew food Chemical: enzymes in saliva break down starches What three organs aide the small intestine with digestion? Gallbladder, liver, and pancreas If you ate a meal of spaghetti and meatballs, where would digestion of the pasta begin? The meat? Spaghetti: in mouth- starches Meatballs: in stomach- proteins

Circulatory and Digestive System Posters Title on top Describe the FUNCTION (job) of your organ Draw a picture Answer all questions on prompt Color Use Big font