DIGESTIVE SYSTEM

Question 1

• Composed of organs whose primary functions are ingestion, digestion, absorption of food and excretion of undigested food
• Includes the mouth, pharynx, esophagus, stomach, small and large intestines and the accessory digestive organs (Salivary glands, Liver, pancreas and gall bladder)

Answer 1

DIGESTIVE SYSTEM

Question 2

Histologic characteristics

Answer 2

1.Tunica mucosa
2.Submucosa
3.Tunica Muscularis
4.Tunica Serosa

Question 3

• Functions: absorptive, secretory, and protective

consist of the ff:
a. Epithelium
o all are lined by simple columnar
o except mouth, pharynx, esophagus, and
lower anus which are lined by stratified
sq. non keratinized
b. Lamina propria
o loose areolar tissue
c. Muscularis mucosa
o made up of smooth muscles

Answer 3

Tunica mucosa

Question 4

• Major function is nutritive and protective
  Connective tissue consisting of the ff:
  o Blood vessels
  o Lymphatics
  o Nerves

Answer 4

Submucosa

Question 5

• Usually 2 layers of smooth muscles, inner circular and outer longitudinal muscle layer
• Stomach has 3 layers of tunica muscularis, inner oblique, middle circular and outer longitudinal muscle layer

Answer 5

Tunica Muscularis

Question 6

• Visceral peritoneum
• It is a single layer of simple squamous epithelium which secretes a small amount of serous lubricating fluid which reduces friction among the GI tract organs and the body wall

Answer 6

.Tunica Serosa

Question 7

I. Digestive tract

Answer 7

A. Oral cavity
B. Pharynx
a. Oropharynx
b. laryngopharynx
C. Esophagus
D. Stomach
E. Small intestines
F. Large intestine
a. Cecum with vermiform appendix
b. Ascending colon
c. Transverse colon
d. Descending colon
e. Sigmoid colon (pelvic colon)
f. Rectum
g. Anal canal

Question 8

II. Accessory organs/glands

Answer 8

A. Lips
B. Teeth
C. Tongue
D. Salivary glands
a. Big
o Parotid
o Submandibular
o Sublingual
b. Small
o Lingual
o Labial
o Buccal
E. Liver
F. Gall bladder
G. Pancreas