Human Abdominal Regions and Organs

Anatomy of the Abdomen

Overview of Abdominal Organs

  • Liver
  • Stomach
  • Gallbladder
  • Duodenum
  • Right Kidney
  • Pancreas
  • Transverse Colon
  • Right Adrenal Gland
  • Small Intestine
  • Large Intestine
  • Cecum
  • Appendix
  • Right Ureter
  • Right Reproductive Organs:
    • Ovary
    • Fallopian Tube
    • Spermatic Cord

Quadrant Division

  • Right Upper Quadrant

    • Contains:
    • Liver
    • Gallbladder
    • Right Kidney
    • Pancreas (partially)
    • Transverse Colon (partially)

  • Right Lower Quadrant

    • Contains:
    • Cecum
    • Appendix
    • Right Ureter
    • Right reproductive organs

  • Left Upper Quadrant

    • Contains:
    • Liver's tip
    • Stomach
    • Left Kidney
    • Spleen
    • Transverse Colon (partially)
    • Pancreas (partially)

  • Left Lower Quadrant

    • Contains:
    • Sigmoid Colon
    • Descending Colon
    • Left Kidney
    • Left reproductive organs

Anatomical Planes and Regions

Planes
  • Transumbilical Plane:
    • An imaginary horizontal line through the umbilicus (navel).
  • Midclavicular Planes:
    • Vertical planes that intersect at the mid-point of the clavicles.
  • Subcostal Plane:
    • A horizontal plane that passes through the lowest point of the rib cage (subcostal margin).
  • Intertubercular Plane:
    • A horizontal plane that passes through the iliac tubercles.
Abdominal Regions Defined using Planes

  • Right Hypochondriac Region:

    • “Hypo” = below, under.
    • “Chondriac” = cartilage of ribs.
    • Contains:
    • Liver
    • Right Kidney
    • Gallbladder

  • Epigastric Region:

    • “Epi” = over, above.
    • “Gastric” = stomach, belly.
    • Contains:
    • Liver (partially)
    • Stomach (partially)
    • Pancreas
    • Adrenal glands

  • Left Hypochondriac Region:

    • Contains:
    • Spleen
    • Left Kidney
    • Stomach (partially)
    • Pancreas (partially)

  • Right Lumbar Region:

    • Contains:
    • Right Kidney
    • Ascending Colon
    • Small Intestine

  • Umbilical Region:

    • Contains:
    • Small Intestine
    • Duodenum
    • Transverse Colon

  • Left Lumbar Region:

    • Contains:
    • Left Kidney
    • Descending Colon
    • Small Intestine

  • Right Iliac Region:

    • “Iliac Crest” = the upper edge of the ilium.
    • Contains:
    • Appendix
    • Cecum
    • Ascending Colon

  • Hypogastric Region:

    • Contains:
    • Bladder
    • Sigmoid Colon
    • Small Intestine
    • Reproductive organs

  • Left Iliac Region:

    • Contains:
    • Sigmoid Colon
    • Descending Colon
    • Small Intestine

Summary of Key Anatomical Relationships

  • Abdominal Regions Importance:

    • Facilitate diagnosis and treatment by allowing healthcare professionals to communicate clearly regarding the location of organs and conditions.

  • Visual Aid:

    • Diagrams may assist in reinforcing the spatial understanding of organ locations relative to one another in the abdominal cavity.

  • Examples of Clinical Applications:

    • Understanding of this anatomical organization is crucial in surgical procedures, imaging studies, and physical examinations.