Digestive

Question 1

Overview of Digestive Organ

Answer 1

Oral Cavity
Pharynx (oro and laryngo)
Esophagus
Stomach
Small Intestine
Large Intestine
Anus

Question 2

Layers of gut tube

ivory trade

Answer 2

1) Tunica Mucosa (3 sub categories:)
epithelium (simple columnar)
lamina propia (loose vascular c.t.)
muscularis mucosae (smooth muscle
2) Tunica Muscularis (2 Layers)
circular layer (smooth muscle)
longitudinal layer (smooth muscle)
3)Tunica Serosa/adventitia (simple squamous epithelium)

Question 3

Surface Variation of tunica mucosa

Answer 3

to increase surface area to absorb more nutrients.

Question 4

esophagus (structural modification)

Answer 4

tunica mucosa--stratified squamous e
tela submucosa-same througout
tunica muscularis- first half skeletal muscle and lower half smooth muscle
tunica adventitia- dense irregular ct
fx: transport

Question 5

Stomach (gross structure)

Answer 5

fundus
body
pylorus
lesser curvature
greater curvature

Question 6

Stomach (structural modification)

think chemistry

Answer 6

tunic mucosa- simple columnar ( and remainder of the way for GI tract)
tela submucosa: same
tunica muscularis: oblique fibers in addition to longitudinal and circular (creates a washing machine effect = fx)
tunica serosa: mesothelium

Question 7

Small Intestine (gross structure)
Also, associated structures (w duodenum)

Answer 7

Duodenum- c shaped- foot long
Jejunum- 7 feet long
Ileum 7 feet long
associated structures:
Liver- creates bile
Gallbladder- stores bile
Pancreas- pancreatic enzymes digest, regulate sugar via insulin and glucagon

Question 8

Small Intestine (structural modifications)

Answer 8

tunica mucosa- circular folds & intestinal vili (simple columnar)
tela submucosa-same
tunica muscularis: same long and circ.
tunica serosa: mesothelium

Question 9

Anatomy of the villus

Answer 9

(don’t over think this)
Villus is modified tunica mucosa.
molecule transfuces through simple columnar e layer to capillary or lymphatic vessel and then on it goes

Question 10

Large Intestine (gross structure)

Answer 10

Caecum
Vermiform appendix (vermi= worm)
Colon (ATDS)
Rectum

Question 11

Large Intestine (structural modification)

Answer 11

Tunica mucosa- semilunar fold, s. columnar e., tela submucosa: same
tunica muscularis: taeniae coli (fx: help push stool along) and haustra (fx: fill up and then push through)
tunica serosa: endothelium + fatty appendages.
fx: salvage fluids