32.2 Digestive System Sponge #8 Word Bank Anus Esophagus Gallbladder Large Intestine Liver Mouth...
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Transcript of 32.2 Digestive System Sponge #8 Word Bank Anus Esophagus Gallbladder Large Intestine Liver Mouth...
32.2 Digestive System
Sponge #8Word Bank
Anus
Esophagus
Gallbladder
Large Intestine
Liver
Mouth
Pancreas
Salivary Glands
Rectum
Small Intestines
Stomach
1
2
3
4
5
67
8
9
10
11
32.2 Digestive System
mouthSalivary glands
esophagus
stomachliver
gallbladder pancreas
Large intestines Small intestines
anusrectum
32.2 Digestive System
•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
32.2 Digestive System
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
32.2 Digestive System
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)
32.2 Digestive System
Digestion begins in the mouth and continues in the stomach.
• Mechanical (teeth) and chemical (saliva) digestion break down food.
• Peristalsis moves food through the organs.esophagus
muscles contract
muscles relax
food
stomach
32.2 Digestive System
• Digestion of carbohydrates begins in the mouth.
• Digestion of proteins occurs in the stomach. • Digestion of fats and sugars occur in the
small intestine.
32.2 Digestive System
• Most digestion takes place in the small intestines. • The pancreas, liver, and gallbladder aid in digestion.
– pancreas helps digest fat and protein – bile from the liver/gallbladder helps digest fats
liver
bile
bile
gallbladder
duodenum
pancreas
enzymes
chyme
stomach
32.2 Digestive System
Sponge # 9
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?
32.2 Digestive System
• 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