11 - Anatomy Of The Digestive System Flashcards
(23 cards)
What does the GI tract contain?
Mouth Pharynx Oesophagus Stomach Small intestine Large intestine Rectum Anus
What are the accessory digestive organs?
Tonge Teeth Salivary glands Liver Gall bladder Pancreas
What is the mouth lines with?
Stratified squamous epithelium
Where are the intrinsic salivary glands located?
In the mucosa
What are the types of extrinsic salivary glands and where are they located?
Parotid
Submandibular
Sublingual glands
They are located outside of the mouth
What does the serosa form?
A 1 cell thick, serous layer, called the visceral peritoneum
What are intraperitoneal structures?
Where the serosa almost completely surrounds some parts of the intestinal tract
What are organs that are not in the peritoneum are called what?
Retroperitoneal
What organs are retroperitoneal?
Suprarenal gland Duodenum Inferior vena cava Duodenum Pancreas Ureters Colon Kidneys Oesophogus Rectum
Which nervous system is embedded into the lining of the GI tract?
Enteric NS
What are the types of ganglia that the neurons of the ENS are collected into?
Myentric
Submucosal plexuses
What are the types of gland in the GI tract?
- Glands outside the GI tract
- Glands in the submuscosa
- Glands in the mucosa
What is the mucosa?
An epithelium layer that lines the lumen of the alimentary canal
What are the 3 layers of the mucosa?
Lining epithelium
Laminate propria
Muscularis mucosae
What are the functions of the mucosa
Secrete mucosa
Absorption of end products of digestion
Protection against infection
How many walls of muscle does the stomach contain and what are they?
3 walls of muscularis external:
Circular
Longitudinal
Oblique
How many sphincters does the stomach have?
2
How long is the small intestine?
6-7 meters
What do brush border enzymes contain in the small intestine?
Di and tripeptdases, sucrase, maltase, lactase
How is the SI divided?
5% duodenum
40% jejunum
55% ilium
Where does villi only occur?
Small intestine
How long is the LI
1.5 meters long
What is included in the LI
Caecum Appendix Colon Rectum Anal canal
