12.3 Anatomy: Abdominal viscera 1 Flashcards
What prevents reflux?
R crus-sling (sphyncteric)
What is the level of the cricoid cartilage?
C6
Where does stratified squamous epithelium become gastric mucosa?
Eosophogastric junction (Z line)
For the cervical region, what is the: Narrowing Arterial supply Venous drainage Lymph drainage
Narrowing: Upper oesophageal sphincter
Arterial supply: Inferior thyroid artery
Venous drainage: Brachiocephalic/systemic
Lymph drainage: Deep cervical nodes
For the thoracic region, what is the: Narrowing Arterial supply Venous drainage Lymph drainage
Narrowing: Aortic arch, LMB
Arterial supply: Oes brs from aorta
Venous drainage: Azygous, systemic
Lymph drainage: medistinal nodes
For the Abdominal region, what is the: Narrowing Arterial supply Venous drainage Lymph drainage
Narrowing: Diaphragmatic orifice
Arterial supply: Left gastric (from aorta)
Venous drainage: L gastric, portal overlaps, systemic
Lymph drainage: Pre-aortic nodes
What are the two different types of hernias?
Sliding hiatal hernia (most common)
Paraoesophageal hiatal hernia
What are the two ligaments that are part of the lesser omentum?
Hepatoduodenal ligament and hepatogastric ligament
Where does the body of the stomach end?
At the angular notch
What are the gastric folds in the stomach called?
Rugae
What is the position of the duodenum?
Retroperitoneal except 1st inch)
What does the duodenum descend on?
Psoas major
Where do enzymes and bile for digestion come from?
Major and minor duodenal papilla
Where does the duodenum run horizontally?
From R to L psoas, at the level of L3
What are the names of the vessels that come off the small intestine?
Vascular arcades (horizontal) Vasa recta (vertical)
Where is the small intestine located and what are the differences between its two segments?
LUQ: Jejunum (larger, absorption-mucosal folds, thick walls)
RLQ: Ileum (smaller)
Where does the appendix come off?
Iliocecal junction
What is the name of the fat tags coming off the large intestine?
Epiploic appendices
What are the 2 layers of muscle in the small intestine?
Inner: circular smooth muscle
External: tubular smooth muscle
What are the layers of muscle in the large intestine?
Outer: 3 bands of teinia
Internal: complete ring of muscle
