Abdomen Lecture Notes Pt. 1 Flashcards
Pain arising from the gut tube will be referred to the
Epigastrium, umbilical, or hypogastrium regions
Lines the entire inside of the abdominal wall
Transversalis Fascia
Gets thick and fatty in the posterior abdominal wall
-Where the kidneys are located
Extraperitoneal layer
Outter covering of peritoneal cavity/inner wall of abdominal cavity
Parietal peritoneum
Envagination of the skin and superficial fascia that has no Camper’s fascia but has a Scarpas fascia (dartos fascia)
Scrotum
Fused together in the inguinal region
Internal oblique and transversalis fascia
Envagination of the transversalis fascia where the spermatic cord becomes continuous with the transversalis fascia
Deep inguinal ring
The folded under free edge of the external oblique aponeurosis
Inguinal ligament
The transition where the internal oblique fibers begin to face downward and medial forms an arch called the
Falx inguinalis
Internal oblique muscle fibers that are envaginated by the testes
Cremaster muscle
The external oblique aponeurosis has a hole in it called the
Superficial inguinal ring
The testes originates in the
Extraperitoneal layer
Both the direct and indirect inguinal hernias exit the
Superficial inguinal ring
What is the anatomical distinguishment between direct and indirect hernias?
Only indirect hernias pass through the deep inguinal ring
Pass MEDIAL to the inferior epigastric artery
Direct inguinal hernias
Pass LATERAL to the inferior epigastric artery
Indirect inguinal hernia
If you kow it’s an inguinal hernia and you place your finger on the DEEP inguinal ring and have the patient cough and you feel the hernia hit your finger in the superficial ring, then the hernia is a
DIRECT inguinal hernia
ALL congenital inguinal hernias are
Indirect Inguinal Hernias
Forms the scrotum in males and the labia major in females
Labiosacral fold
Forms the gubernaculum testes in males and the round ligament of the uterus in females
Caudal Genital Ligament
Gets to the ovary in a fold of peritoneum called the suspensatory ligament of the ovary
Ovarian artery
Causes the dorsal part of the yolk sac to start getting internalized to become the gut tube
Lateral body folding
Pinches off the yolk sac and fully internalizes the gut tube
Fusion of lateral body folds
Once the gut tube forms, we get epithelium proliferation which occludes the lumen by forming the
Epithelial plug
Apoptosis of this epithelial plug reforms the lumen of the gut tube. Failure of this process can result in either
Stenosis (partial block) or Atresia (complete block)
Lateral body folds fuse in the midline to form the
Ventral body wall
Failure of the lateral folds to completely fuse
Gastroschisisis
Proximal part of vitelline duct fuses but the distal end remains open to the exterior
Vitelline sinus
We have overlapping blood supply in the
Duodenum and transverse colon
There are no structures found in the
Coelom
An organ that is COMPLETELY surrounded by peritoneum is called a
Peritoneal organ
An organ that is only PARTIALLY surrounded by peritoneum is called a
Retroperitoneal organ
Peritoneum that COMPLETELY surrounds peritoneal organs is called
Visceral peritoneum
Peritoneum that covers retroperitoneal organs is called
Parietal peritoneum
Peritoneum that connects parietal and visceral peritoneum is called
Mesentary
A ventral evagination of endoderm into the ventral mesentary forms the
Hepatic diverticulum (which forms liver, gallbladder, and bile duct)
The ventral mesentary gives rise to the
Lesser omentum, Falciform ligament, and visceral peritoneum of the liver
The bile duct is found INSIDE of the
Lesser omentum (at the free edge)
The hepatic diverticulum evaginates from the second part of the duodenum, thus the bile duct enters the duodenum in the
2nd part
The bilary duct system is made up of which three parts?
- ) Common bile duct (hepatic diverticulum)
- ) Cystic duct (to gall bladder)
- ) Hepatic Duct (to liver)