Peritoneal Cavity

ABDOMEN: Overview

  • Abdominal Cavity Visceral Organs

    • Understanding of anatomical structures located in the abdomen, covering the peritoneum and divisions.

ABDOMEN: Peritoneal Cavity

  • Definition and description of the peritoneal cavity, an essential aspect of abdominal anatomy.

ABDOMEN: Abdominal Cavity

  • Coronal (Frontal) View

    • Anatomic distinction between the different cavity types:

    • Mediastinum

    • Pleural Cavity

    • Thoracic Cavity

    • Pericardial Cavity

    • Diaphragm

    • Abdominal Cavity

    • Pelvic Cavity

    • Abdominopelvic Cavity

ABDOMEN: Peritoneum

  • Layers of the Peritoneum

    • Parietal Layer

    • Lines the abdominal wall.

    • Visceral Layer

    • Covers the abdominal organs.

  • MESENTERY / MESOCOLON

    • Unique structures formed by the peritoneum that connect and support the intestines.

    • Intraperitoneal vs. Retroperitoneal Organs:

    • Intraperitoneal Organs: Completely surrounded by the peritoneum.

    • Retroperitoneal Organs: Located behind the peritoneum.

    • Examples include:

      • Intraperitoneal: Liver, Stomach, Intestines

      • Retroperitoneal: Pancreas, Rectum

ABDOMEN: Intestines and Mesentery

  • LARGE INTESTINE (COLON)

    • Connected to the mesentery.

  • SMALL INTESTINE

    • Also associated with the mesentery.

ABDOMEN: Greater Omentum

  • Structure and Function

    • GREATER OMENTUM: A fold of peritoneum that hangs from the stomach.

  • Relations of the Greater Omentum:

    • Stomach

    • Liver

    • Omental Bursa: A recess behind the stomach.

    • The greater omentum plays a role in immunity and fat storage.

ABDOMEN: Relations to Other Omenta

  • Lesser Omentum

    • Connects the stomach and liver; functions in support and protection.

  • Gastrocolic Ligament

    • Anchors the greater omentum to the transverse colon.

ABDOMEN: The Foregut

  • Components:

    • ESOPHAGUS

    • STOMACH

    • DUODENUM

  • OMENTAL FORAMEN (Foramen of Winslow)

    • Important anatomical space that connects the greater and lesser sac of the peritoneum.

  • Associated Organs:

    • Spleen, Pancreas, etc.

ABDOMEN: The Midgut

  • Components and Structure:

    • Jejunum

    • Ileum

    • Cecum

    • Vermiform Appendix

    • Ascending Colon and Transverse Colon

    • Flexures:

    • Right Colic Flexure

    • Left Colic Flexure

ABDOMEN: The Hindgut

  • Components:

    • RECTUM

    • DESCENDING COLON

    • SIGMOID COLON

ABDOMEN: Retroperitoneal Organs

  • Key Structures:

    • Right Suprarenal Gland

    • Left Suprarenal Gland

    • Right Kidney

    • Left Kidney

    • Duodenum

    • Pancreas

  • Understanding the positions of these organs is essential for surgical procedures and diagnosis related to the abdomen.