Body cavities Flashcards
Serous membrane (functions)
Lines body cavities
Produces serous fluid
2 types of serous membrane
Parietal: lines boundaries or sides or cavity
Visceral: covers all organs within the cavity
What does the parietal pleura line?
Inside of thoracic cavity
What does the costal pleura cover?
Ribs
What does the diaphragmatic pleura cover?
Diaphragm
What does the pulmonary pleura cover?
Lungs
What is the mediastinum?
Connective tissue septum that divides the thorax into 2 sides
Contents of thoracic cavity 9
Heart , Lungs
Trachea, oesophagus
Thymus gland, Lymph nodes
Arteries, Veins, Nerves
Pericardial cavity
Small cavity containing heart which sits within pericardium (within the medastinum)
Serous visceral pericardium/ epicardium
Layer closest to the heart in pericardial cavity
Fibrous/parietal pericardium
Outer layer of pericardial cavity
Parietal peritoneum
Serous membrane around the abdominal cavity
Peritoneal cavity
Space between parietal and visceral peritoneum
Peritoneum
Membrane lining the inner wall of abdomen
Mesentery
Double layer of peritoneum and attaches the vasculature and nerves to the intraperitoneal organs.
What does the mesentery support?
Intestines from dorsal wall of abdomen
Examples of folds of mesentary
Mesoduodenum
Mesovarium
Omentum
Folds of peritoneum extending from stomach to adjacent organs (Greater and lesser omentum)
Contents of abdominal cavity
Stomach
Small & large intestines
Liver
Pancreas
Spleen
Urethra
Kidney
Bladder
Uterus
Ovaries
Prostate gland
Aorta
Contents of pelvic cavity
Urinary bladder
Rectum
Reproductive organs
Thoracic cavity boundaries
Cranial: thoracic inlet
Caudal: diaphragm
Dorsal: thoracic vertebrae & hypaxial muscle
Ventral: sternum
Lateral: ribs & intercostal muscles
Abdominal cavity boundaries
Cranial: diaphragm
Caudal: pelvic inlet
Dorsal: Lumbar vertebrae and hypaxial muscles
Ventral: Muscles of ventral abdominal wall
Lateral: Muscles of lateral abdominal wall
Pelvic cavity boundaries
Cranial: pelvic inlet
Caudal: pelvic outlet
Dorsal: Sacrum
Ventral: Floor of pelvis
Lateral: lateral wall of pelvis
