Histology of the small Intestine Flashcards Preview

Anatomy Exam 1 > Histology of the small Intestine > Flashcards

Flashcards in Histology of the small Intestine Deck (13):
1

Serosa

smooth membrane covered the intestine
A thin film of lymph, permits free motion of the intestines
two elements
1. Visceral peritoneum
2. Loose connective tissue

2

Visceral Peritoneum

Outermost layer
surrounds all of the other abdominal organs

3

Loose connective tissue

Contains blood vessels, nerves, and lymphatic vessels

4

Partietal Peritoneium

Lines the walls of the abdominal cavity

5

Longitudinal (Outer layer) and Circular Smooth Muscle (Inner layer)

Deep to the serosa, two thick layers of smooth muscle
Responsible for peristalsis

6

Peristalsis

Wave- like contractions that sweep along the extent of the intestines, slowly propelling the contents toward the rectum.

7

Submucosa

Loose connective tissue
adjacent to the circular smooth muscle
contains lymph follicles, blood vessels and nerves

8

Lymph Follicles

Temporary structures, temporary collections of white blood cells that gather in response to the appearance of an antigen in the gut. Once gone it disappears.

9

Muscularis mucosa

Thin layer of smooth muscle
Located btwn the submucosa and the lamina propria

10

Intestinal villi

Epithelial lining of the intestine
Finger like folds, Project into the lumen and serve to greatly increase the total surface area of the small intestine
NO VILLI IN THE COLON
Contain arterioles and venules, and lymphatic vessels

11

Simple columnar Epithelium

Line the small and large intestines

12

Lacteal

Lymphatic vessels
contain absorbed nutrients that cannot enter the intestinal capillaries, like large lipid-protein complexes, transported in the lymph vessels to the thoracic duct

13

Nutrients passage way

Absorbed nutrients enter the capillaries and venules of the villi
Go through the veins in the lamina propria, submucosa and serosa
Then go to the hepatic portal circulation
transported to the liver where digestion is completed.