Sectional Anatomy Unit 4

Esophagus path

1. Begins at distal end of pharynx 2. Crosses diaphragm at Esophageal hiatus 3. Enters stomach at Cardiac sphincter

Gut Signature

Bull's eye in cross-section with echogenic center (air in lumen) and hypoechoic rim (gut wall) surrounded by another echogenic layer (periserosal fat)

Parietal Peritoneum Visceral Peritoneum

P-out layer, interior of abdominal cavity V-inner layer, covers outside of organ

Leinorenal Ligament

attaches left kidney to spleen and both to posterior abdominal wall

Lesser Omentum

attaches lesser curvature of stomach to liver

Falciform Ligament

attaches liver to anterior abdominal wall and diaphragm

Gastrosplenic Ligament

attaches spleen to stomach and both to posterior abdominal wall

Colic Compartments

division of peritoneal cavity into superior and inferior sections by transverse colon and its mesentery

Omentum

double layered fold of peritoneal membrane that attaches stomach to another organ

Mesentery

double layered fold of the peritoneal membrane that attaches part of the intestine to the posterior abdominal wall

Peritoneum

double layered, serous membrane (secretes fluid between layers) that lines abdominal cavity and covers abdominal organs formed by mesothelium

Greater Omentum

fatty apron, hangs from greater curvature of stomach; folds back on itself and attaches to transverse colon

Ligamentum Teres

lies within falciform ligament and is a remnant of the paraumbilical vein (fetal umbilical vein -> ductus venosus)

Subhepatic spaces

small slit-like spaces within the peritoneum under the liver on each side of the portal hepatis Morison's pouch-right; between liver/kidney, common collection point for ascites

Subphrenic spaces

small spaces between the diaphragm and the liver, on each side of the Falciform Ligament

Peritoneal Cavity

space between parietal peritoneum and visceral peritoneum, contains small amount of serous fluid that acts a lubricant for organs to slide around

Paracolic Gutters

spaces along the ascending and descending colon which allow fluid/blood/pus/cancer cells to flow from one area of the abdomen to another

Ligament

two-layered fold of peritoneal membrane that attaches abdominal organs to anterior/posterior abdominal wall