32.2 digestive system sponge word bank anus esophagus gallbladder large intestine liver mouth...
TRANSCRIPT
32.2 Digestive System
Sponge Word Bank
Anus
Esophagus
Gallbladder
Large Intestine
Liver
Mouth
Pancreas
Salivary Glands
Rectum
Small Intestines
Stomach
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32.2 Digestive System
mouthSalivary glands
esophagus
stomachliver
gallbladder pancreas
Large intestines Small intestines
anusrectum
29.4 Central and Peripheral Nervous Systems Set up Cornell Notes on pg. 79•Topic: 32.2 Digestive System
•Essential Question(s):
1. No EQ
2.1 Atoms, Ions, and Molecules
32.2 Digestive System
32.2 Digestive System
KEY CONCEPTThe digestive system breaks down food into simpler molecules.
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
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 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
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
32.2 Digestive System
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
32.2 Digestive System
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
32.2 Digestive System
• Aid in digestion– Pancreas: helps digest fat, protein, and starches– Liver: Produces bile which helps digest fats – Gallbladder: stores bile
liver
bile
bile
gallbladder
duodenum
pancreas
enzymes
chyme
stomach
Pancreas, Liver, and Gall bladder
32.2 Digestive System
Small Intestines
• Most digestion takes place in the small intestines• Digests:
– Proteins– Fats – Sugars
32.3 Absorption of Nutrients
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
32.2 Digestive System
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?
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
32.2 Digestive System
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