Abdomen - Lecture 3 Flashcards
Accessory Organs to Digestion
- Liver
- Gall Bladder
- Pancreas
- Spleen
Where is the liver located?
Mostly in the right hypochondrium and a little in the epigastric region
What are the surfaces of the Liver?
- Diaphragmatic Surface
2. Visceral Surface
Diaphragmatic Surface of the Liver
- Part of Liver in contact with the Diaphragm
- Anterior, Posterior, & some Superior
- 3/4 of the liver
What are the Recesses (Potential Spaces) associated with the Liver?
- Subphrenic Recess
- Hepatorenal Recess
THEY ARE CONTINUOUS WITH EACH OTHER
Subphrenic Recess
- Separates the Liver from the Diaphragm
2. Divided into Right and Left by the Falciform Ligament
Hepatorenal Recess
Potential space between the Liver and the Right Kidney/Right Adrenal Gland
Visceral Surface of the Liver
- Inferior Portion
- Covered in Visceral Peritoneum (aside from Fossa of Gall Bladder)
- Location of the Porta Hepatis
What is the Porta Hepatis of the Liver and where is it located?
- On the Visceral Surface of the Liver (inferior side)
- Point of ENTRY for the hepatic artery and portal vein
- EXIT for the Bile Duct
What is the Portal Triad of the Liver and where is it located?
- Hepatic Artery ENTERS
- Portal Vein ENTERS
- Bile Duct EXITS
All of this happens at the PORTA HEPATIS
Lobes of the Liver
- Right Lobe
- Left Lobe
- Caudate Lobe
- Quadrate Lobe
Ligamentum Teres
Piece of the Falciform Ligament that just sort of hangs off
Falciform Ligament and Ligamentum Teres are remnants of…
Umbilical Vein
What lobes of the Liver CANNOT be seen anteriorly (Diaphragmatic Surface)?
- Caudate Lobe
2. Quadrate Lobe
Right Lobe of the Liver
- Largest Lobe
- Separated from Left Lobe by Falciform Ligament
- Gives rise to Caudate Lobe
Left Lobe of the Liver
- Separated from the Left Lobe via Falciform Ligament
2. Functionally related to/gives rise to Quadrate Lobe
Caudate Lobe
- Only visible on Posterior part of Visceral Surface
- Arises from the Right Lobe
- Left side bound to Ligamentum Venosum
- Right side bound to IVC
Quadrate Lobe
- Located on the Anterior portion of the Visceral Surface
- Left side bound to Ligamentum Teres
- Right side bound to Fossa of Gall Bladder
- Functionally related to/arises from Left Lobe
Ligamentum Venosum
Formerly the Ductus Venosum shunt that bypassed the Liver in fetal circulation
Where is the Gall Bladder Fossa (location in relation to the Liver)?
- On the Visceral Surface (Inferior portion) of the Liver
2. Between Right and Quadrate Lobes
Parts of the Gall Bladder
- Fundus (rounded top part)
- Body (middle, major part in the Gall Bladder Fossa)
- Neck (narrow bottom formed by mucosal folds)
Where is Bile made?
Liver
Where is Bile stored?
Gall Bladder
What does Bile do?
Emulsifies fat (breaks big fat globules into tiny droplets) which is important for digestion
How is Bile transported to the Duodenum?
Biliary Tree (Biliary Tract)
Pathway of Bile from the Liver to storage in the Gall Bladder
- Bile EXITS Liver via Right and Left Hepatic Duct
- Right and Left join to become the Common Hepatic Duct
- Bile travels down the Common Hepatic Duct and into the Cystic Duct
- Bile travels through Cystic Duct to be stored in the Gall Bladder
Pathway of Bile from the Gall Bladder to the Duodenum
- CCK released in the colon signifying to the Gall Bladder that fats are present
- Gallbladder contracts
- Bile is sent from the Gall Bladder through the Cystic Duct and into the Bile Duct
- Bile travels down the Bile Duct until it enters the Duodenum at the Hepatopancreatic Ampulla (Ampulla of Vater)
Hepatopancreatic Ampulla
- Opening where the Bile Duct and Pancreatic Duct empty into the Duodenum
- Other side of the Major Duodenal Papilla
- AKA Ampulla of Vater
Major Duodenal Papilla vs. Hepatopancreatic Ampulla
Two sides of the same opening:
- Major Duodenal Papilla is on the Duodenum side (splits the Foregut and Midgut)
- Hepatopancreatic Ampulla is on the Duct side
Where does the Liver receive blood from?
Right and Left Hepatic Arteries
Where do the Right and Left Hepatic Arteries come from?
Descending Aorta > Celiac Trunk > Common Hepatic Artery > Hepatic Artery Proper > Right and Left Hepatic Arteries
Where does the Gall Bladder receive blood from?
Cystic Artery
Where does the Cystic Artery come from?
Descending Aorta > Celiac Trunk > Common Hepatic Artery > Hepatic Artery Proper > Right Hepatic Artery > Cystic Artery
Where is the Pancreas located?
- Posterior to the Stomach between Spleen and Duodenum
2. Connected to the Spleen via Ligament