Upper GI Tract Flashcards Preview

Tissue Biology > Upper GI Tract > Flashcards

Flashcards in Upper GI Tract Deck (99)
Loading flashcards...
1

What is the upper gastrointestinal tract?

An organ system responsible for transporting and digesting foodstuffs, absorbing nutrients and expelling waste

2

What is included in the gastrointestinal tract?

Oral cavity, oesophagus, stomach, small intestine, large intestine and anus

3

What does the muscular wall of the GI tract provide?

Strength and aids in transport of food

4

What does the mucosa layer of the GI tract consist of?

The epithelium and the lamina propria

5

What does the lamina propria contain?

Blood vessels, lymphatics, mucous glands

6

What is the muscularis mucosae?

It is a thin layer of muscle of the gi tract located outside the lamina propria and separates the lamina propria from the submucosa. Involved in local movement and folding of the mucosa

7

What is contained in the submucosa?

nerves, blood vessels and supporting connective tissue

8

What is the muscularis propria layer of the GI tract?

Contains two layers, the outer longitudinal layer and the inner circular layer

9

What is special about the muscularis propria in some places?

In the stomach there is a third inner layer, along with the outer longitudinal layer and inner circular layer, called the third inner oblique layer

10

What is the adventitia?

A layer of loose supporting tissue within the abdominal cavity

11

Where the gut lies within the abdominal cavity, what is the adventitia referred to and what type of cells make it up?

Referred to as the serosa and is lined by a simple squamous epithelium called the mesothelium

12

There are basic mucosal forms in the GI tract, where would you find protective?

In the oral cavity, pharynx, oesophagus, anal canal

13

There are basic mucosal forms in the GI tract, where would you find secretory?

Stomach

14

There are basic mucosal forms in the GI tract, where would you find absorptive?

Small intestine

15

There are basic mucosal forms in the GI tract, where would you find absorptive/protective?

the whole large intestine

16

What time of epithelium would you find in protective mucosa?

Stratified squamous

17

Secretory mucosa is only found in which part of the gi tract?

In the stomach

18

If you had to describe the tongue as a muscle how would you describe it?

A mass of striated muscle

19

What is the tongue covered by?

By a mucous membrane with a variable structure

20

What covers the dorsal surface of the tongue?

Numerous papillae

21

The posterior third of the tongue is separated from the anterior two thirds of the tongue by what?

a v shaped boundary

22

The posterior portion of the tongue mainly contains what?

Small lymphoid aggregates

23

Where are filiform papillae found on the tongue and do they contain taste buds?

They are found on the entire surface of the tongue and no they do not contain taste buds

24

Where are the fungiform papillae found on the tongue and do they contain taste buds?

They are found interspersed among the filiform papilla and they contain taste buds

25

Where are the foliate papillae found?

They are found towards the back edges of the tongue and they are not well developed in humans

26

How would you describe the structure of the circumvallate papillae on the tongue?

They are the largest and least common, encircled by a deep cleft,

27

What is the side of the circumvallate papillae on the tongue?

Very large, 7-12mm

28

What types of glands are associated with the circumvallate papillae?

With serous glands (von Ebner's glands)

29

Where do the serious glands called von ebner's glands open into in the circumvallate papillae?

Open into the base of the cleft

30

What do the serous glands called the von ebners glands to be precise found on the circumvallate papillae secrete and what is the function of this secretion?

They secrete lipase which dissolves food constituents and facilitates taste reception