Alimentary System Overview 2 Flashcards
What are the 9 regions of the GIT?
- R Hypochondrium
- Epigastrium
- L Hypochondrium
- R Lumbar
- Periumbilical
- L Lumbar
- R Iliac fossa
- Hypogastrium
- L Iliac fossa
What ailments can affect the foregut?
- Peptic ulcer
- Gastric disease
- Biliary disease
- Pancreatic disease
- Hepatic disease
What ailments can affect the midgut?
- Appendicitis
- Small bowel obstruction
- Proximal colon cancer
What ailments can affect the hindgut?
- Large bowel obstruction
- Diverticular disease
- Carcinoma of the colon
What is the oesophagus?
Muscular tube that normally has 3 constrictions
How long is the oesophagus?
25cm
What are the constrictions of the oesophagus?
- Cervical
- Thoracic
- Diaphragmatic
Where is the cervical constriction of the oesophagus?
15cm from the incisor teeth
What is the thoracic constriction of the oesophagus crossed by?
- Arch of the aorta (22.5 cm from incisor teeth)
- Left main bronchus (27.5 cm form incisor teeth)
What is the diaphragmatic constriction of the oesophagus?
Where it passes through the oesophageal hiatus of the diaphragm (40cm from the incisor teeth)
Why is awareness of the constrictions of the oesophagus important?
For passing instruments through the oesophagus into the stomach
What are the parts of the stomach?
- Cardia
- Fundus
- Body
- Pyloric part
What are the curvatures of the stomach?
- Greater
- Lesser
What is the pyloric sphincter in charge of?
Control of discharge of stomach contents into the duodenum
What does the stomach bed consist of?
- Diaphragm
- Spleen
- Left kidney
- Adrenal gland
- Splenic artery
- Pancreas
- Transverse mesocolon
- Colon
Congenital pyloric stenosis
Thickening of smooth muscle in the pylorus
What is the portal triad of the liver?
- Hepatic artery
- Portal vein
- Bile duct
What is the surface anatomy of the liver?
Lies deep to ribs 7-11 on the right side
Where is the portal triad of the liver found?
Lesser omentum
What do the biliary ducts do?
Carry bile form the liver to the gallbladder
Where is bile produced?
Liver
Where is bile concentrated and stored?
Gall bladder
How much bile can the gallbladder store?
Up to 50ml
What is the artery of the gallbladder?
Cystic artery
Where does the cystic artery lie?
Lies in the triangle of calot
What is the triangle of calot?
Triangle between common hepatic duct, cystic duct and visceral surface of liver
What is the pancreas?
Accessory digestive gland
What does the pancreas produce as an exocrine gland?
Pancreatic juice
What does the pancreas produce as an endocrine gland?
Insulin and glucagon
Where does the pancreas lie?
Lies along the transpyloric plane (L1/L2)
What are the parts of the pancreas?
- Head
- Neck
- Body
- Tail
Where is the portal vein formed?
Behind the neck of the pancreas
How does the pancreas lie in relation to the peritoneum?
Retroperitoneal
What is the spleen?
Mobile haemo-lymphoid organ
Where is the spleen located?
Left hypochondrium
How is the spleen covered?
Entirely covered by the peritoneum except at the hilum
What is the surface anatomy of the spleen?
Ribs 9-11 on the left side
What is the most frequently injured abdominal organ?
Spleen
Splenomegaly
Abnormal enlargement of spleen
What are some causes of splenomegaly?
- Anaemia
- Typhoid fever
What is the blood supply of the foregut?
Celiac trunk
What is the origin of the celiac trunk?
Abdominal aorta (T12)
What are the main branches of the celiac trunk?
- Left gastric artery
- Hepatic artery
- Splenic artery