Download Living Environment

Living Environment
Digestive System
Aim
What is the function of the digestive system?
What are the structures of the digestive system?
How does the digestive system work to maintain
homeostasis?
Major Structures of the Digestive System
1. Mouth
2. Pharynx
3. Esophagus
4. Stomach
5. Small Intestine
6. Large Intestine
Accessory Structures of the Digestive System
1. Salivary glands
2. Pancreas
3. Liver
What is the function of the digestive system structures?
To convert foods into simpler molecules that can be used
by the cells of the body
Chemical vs Mechanical Digestion
Chemical Digestion: The breakdown of food by chemicals
in the mouth(digestive enzymes) and
stomach(Acids/Enzymes)
Mechanical Digestion: Physical breakdown of food in the
mouth(chewing) and stomach(muscular contractions)
Describe how each of the following aids in digestion use
text pgs 978-984
1. Mouth/teeth
Mechanical and chemical digestion
2. Saliva
Chemical digestion
3. Esophagus
Peristalsis, pushing food to the stomach
4. Stomach
Mechanical & Chemical digestion
5. Pancreas/liver
Secrete digestive enzymes
6. Small Intestine
Chemical digestion/nutrient absorption
7. Large Intestine
Remove water from undigested material
Living Environment
Digestive System
Aim
What is the function of the digestive system?
What are the structures of the digestive system?
How does the digestive system work to maintain
homeostasis?
Major Structures of the Digestive System
1.
2.
3.
4.
5.
6.
Accessory Structures of the Digestive System
1.
2.
3.
What is the function of the digestive system structures?
Chemical vs Mechanical Digestion
Chemical Digestion:
Mechanical Digestion:
Describe how each of the following aids in digestion. Use
text pgs 978-984
1. Mouth/teeth
2. Saliva
3. Esophagus
4. Stomach
5. Pancreas/liver
6. Small Intestine
7. Large Intestine