Chapter 6

False Pelvis

Descriptive term given to the area superior to the pelvic inlet (linea terminalis) and inferior to the iliac crests. Also called greater pelvis or pelvis major.

True Pelvis

Descriptive term given to the region deep to the pelvic inlet (linea terminalis). Also called lesser pelvis or pelvis minor.

Abdominal Cavity

Division of the ventral cavity and peritoneal cavity that extends inferiorly from the diaphragm and is continuous with the pelvic cavity through the pelvic inlet.

What parts of the body are considered Intraperitoneal organs

Gallbladder Liver (except for bare area) Ovaries Spleen (except for hilum) Stomach intestines Majority of intestines GLOSSI

Diaphragm

Large muscle that assists inspiration and divides the ventral cavity into upper thoracic and lower peritoneal cavities.

Greater Sac

Peritoneal compartment of the abdominal cavity that extends from the diaphragm to the pelvis and covers the width of the abdomen.

Lesser Sac

Peritoneal compartment posterior to the stomach that is a diverticulum of the greater sac. Also known as the omental bursa.

Visceral Peritoneum

Portion of peritoneal lining that completely covers various organs and body structures.

Intraperitoneal

Refers to certain body structures enclosed within the parietal peritoneal sac and covered by peritoneum. They are connected to the cavity wall by mesentery, double folds of peritoneum.

"SAD PUCKER"-

Suprarenal (adrenals), Aorta/IVC, Duodenum (2nd/3rd part), Pancreas (except tail), Ureters, Colon (Asc/desc), Kidneys, Esophagus, Rectum

Omentum

—A double layer of peritoneum that extends from the stomach to adjacent abdominal organs. Classified as two parts: the greater omentum and the lesser omentum.

Pelvic Inlet

—Describes the circumference of the linea terminalis.

Pelvic Cavity

—Division of the ventral cavity and peritoneal cavity that extends superiorly from the iliac crests to the pelvic diaphragm inferiorly. Continuous with the abdominal cavity.

Thoracic Cavity

—Division of the ventral cavity. An enclosed area that basically corresponds to the rib cage. Separated from the abdominal cavity by the diaphragm. Contains the bronchi and lungs.

Peritoneal Cavity

—Division of the ventral cavity. Largest body cavity, encompassing the abdomen and pelvis. Also known as abdominopelvic cavity.

Mesentery Omentum —A double layer of peritoneum that extends from the stomach to adjacent abdominal organs. Classified as two parts: the greater omentum and the lesser omentum.

—Double folds of peritoneum that connect intraperitoneal body structures to the cavity wall.

Linea Terminalis

—Imaginary line drawn from the symphysis pubis around to the sacral promontory, marking the dividing plane between the true and false pelves. The circumference of this plane is termed the pelvic inlet.

Ventral Cavity

—One of two main body cavities. Situated on the anterior (ventral) side of the body. Divided by the diaphragm into the abdominopelvic (or peritoneal) cavity and thoracic cavity.

Dorsal Cavity

—One of two main body cavities. Situated on the posterior (dorsal) side of the body. Contains the cranial cavity and spinal cavity.

Parietal Peritoneum

—Portion of peritoneal lining that forms a closed sac (except in females, in whom a portion of the fallopian tubes opens into it).

Retroperitoneal

—Refers to certain body structures that lie behind or posterior to the parietal peritoneal sac. Only their anterior surface is in contact with the peritoneal lining.

Peritoneum or Peritoneal Membrane

—Thin, membranous sheet of tissue that secretes serous fluid. Serves as a lubricant and facilitates free movement between organs.