1. 2.07 Remember the structures of the digestive system

2. What are the structures of the digestive system?
Essential Question
What are the structures of the digestive system?
2.07 Remember the structures of the
digestive system

3. Structures of the digestive system
Also known as:
*Alimentary Canal
Digestive Tract
Gastrointestinal Tract
Upper GI
Lower GI
Approximately 30’ in length from mouth to anus
2.07 Remember the structures of the
digestive system

4. Structures of the digestive system
*Primary structures
Mouth
*Esophagus
Stomach
Small intestines
Large intestines
*Accessory structures
Tongue
Teeth
Salivary glands
Pancreas
Liver
*Gall bladder
2.07 Remember the structures of the
digestive system

5. Structures of the digestive system
*Mouth
(*buccal cavity)
Tongue
Teeth
Salivary Glands
*Palate
Uvula
2.07 Remember the structures of the
digestive system

6. Structures of the digestive system
Tongue
Attached to floor of mouth
Made of skeletal muscle attached to four bones
Taste buds on the surface
Sweet
Sour
Bitter
Salty
2.07 Remember the structures of the
digestive system

7. Structures of the digestive system
Teeth
Primary (deciduous)
20 “baby teeth”
Secondary (permanent)
32 “adult teeth”
Did you know???
Canine teeth are also
known as cuspids and
eye teeth.
2.07 Remember the structures of the
digestive system

8. Structures of the digestive system
Salivary glands
Parotid gland
Largest salivary gland
Submandibular gland
Near the angle of the lower jaw
Sublingual gland
Under the tongue
2.07 Remember the structures of the
digestive system

9. Structures of the digestive system
Palate-separates the mouth from the nasopharynx
Hard
Soft
Uvula
Flap of skin
hanging in the
back of the throat; prevents food from entering the nasal cavity
2.07 Remember the structures of the
digestive system

10. Structures of the digestive system
Pharynx (throat)
Nasopharynx
Oropharynx
Hypopharynx
2.07 Remember the structures of the
digestive system

11. Structures of the digestive system
Esophagus
Muscular tube, 10” long
Connects the pharynx and stomach
Esophageal wall layers
Mucosa
Submucosa
Muscular
External serous
2.07 Remember the structures of the
digestive system

12. Structures of the digestive system
Stomach
Upper left quadrant of the of the abdominal cavity
Fundus (top)
Body (middle)
Pylorus (lower)
Cardiac Sphincter
Between esophagus and stomach
Pyloric Sphincter
Between stomach and small intestines
Rugae
Folds of gastric mucosa inside the stomach

13. Structures of the digestive system
Small intestines
Duodenum
First segment
12” long
Receives bile from the gallbladder and liver
Jejunum
Second segment
8’ long
Ileum
Third segment
10-12’ long
2.07 Remember the structures of the
digestive system

14. Structures of the digestive system
Accessories…
Pancreas
Feather shaped organ
Secretes digestive enzymes to break down food
Located behind stomach
Liver
Largest organ of body
Connects to gall bladder and small intestine by ducts
Gall Bladder
Small muscular sac, located in the right upper quadrant of the abdomen
Stores and concentrates bile until needed by body

15. Structures of the digestive system
*Large intestines
Approximately 2” in diameter
5’ long
*Receives chyme (thick, creamy liquid food) from the ileum
2.07 Remember the structures of the
digestive system

16. Structures of the digestive system
*Large intestines
*Cecum-pouch at the beginning of the large intestines; located in the abdominal cavity
Ascending colon-1st section; located in abdominal cavity
Transverse colon-middle; located in abdominal cavity
*Descending colon/sidmoid colon-extends into the rectum
Anus-the EXTERNAL opening of the large intestines

17. Structures of the digestive system
Check your knowledge…
2.07 Remember the structures of the
digestive system

18. What are the structures of the digestive system?
Essential Question
What are the structures of the digestive system?
2.07 Remember the structures of the
digestive system