DIGESTIVE SYSTEM Mr. Scisly 6 th Grade Health ml ml

“What Happened to the Apple?”

Digestive System 3 Functions 1) Digestion- Breaks down food into simpler substances (Nutrients) 2) Absorption- Nutrients are absorbed into the blood and carried throughout the body 3) Elimination- Wastes are eliminated from the body

Digestive System Diagram

2 Types of Digestion Mechanical Mechanical Chemical Chemical

The Mouth Mechanical Digestion- Teeth Mechanical Digestion- Teeth Chemical Digestion- Saliva Chemical Digestion- Saliva Ptyalin- Chemical in Saliva that breaks down starches Ptyalin- Chemical in Saliva that breaks down starches

Epiglottis Seals off your windpipe when you swallow food Seals off your windpipe when you swallow food

Esophagus A muscular tube that connects the mouth to stomach A muscular tube that connects the mouth to stomach Peristalsis- Involuntary muscular contractions the push food toward the stomach Peristalsis- Involuntary muscular contractions the push food toward the stomach

Stomach “J” shaped organ located in the abdomen where the majority of mechanical digestion occurs. “J” shaped organ located in the abdomen where the majority of mechanical digestion occurs.

Stomach Mechanical Digestion- Churning motion like a washing machine Mechanical Digestion- Churning motion like a washing machine Chemical Digestion- (Gastric Juice) Pepsin and Rennin digest Proteins Chemical Digestion- (Gastric Juice) Pepsin and Rennin digest Proteins

Guided Practice Work on numbers 1-6 ONLY on page 7 in your packet. Work on numbers 1-6 ONLY on page 7 in your packet.

“What Happened to the Apple?”

Final Digestion and Absorption Small Intestine- Part of the digestive system where the majority of chemical digestion takes place, as well as the absorption of nutrients Small Intestine- Part of the digestive system where the majority of chemical digestion takes place, as well as the absorption of nutrients

Liver The largest and heaviest organ inside the body that produces Bile. The largest and heaviest organ inside the body that produces Bile. Bile- Chemical made by the liver that breaks down fats. (Stored in gall bladder.) Bile- Chemical made by the liver that breaks down fats. (Stored in gall bladder.)

Pancreas Triangular shaped organ that make pancreatic juices, which are enzymes that break down starches, proteins, and fats. Triangular shaped organ that make pancreatic juices, which are enzymes that break down starches, proteins, and fats.

Absorption in the Small Intestine Villi- Fingerlike projections that increase surface area in the small intestine for the absorption of nutrients. Villi- Fingerlike projections that increase surface area in the small intestine for the absorption of nutrients.

Elimination Large Intestine- Where water is absorbed and waste is readied for elimination. Large Intestine- Where water is absorbed and waste is readied for elimination. Rectum- A short tube at the end of the large intestine where solid waste is stored Rectum- A short tube at the end of the large intestine where solid waste is stored Anus- a Muscular opening at the end of the rectum where waste is eliminated from the body Anus- a Muscular opening at the end of the rectum where waste is eliminated from the body

Guided Practice Complete page 7 in your packet. Complete page 7 in your packet. WORD BANK Liver Small Intestine Ptyalin Esophagus Enzymes Stomach Peristalsis Pepsin Complete page 8 in your packet Complete page 8 in your packet