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Body Cavities
| Term | Definition |
|---|---|
| Posterior Aspect | Cranial cavity, vertebral canal ( encased in bone, physically, and developmentally different from ventral cavity |
| Cranial Cavity | (Endocranium) - formed by cranium - Houses the brain |
| Vertebral canal | - Formed by vertebral column - Contains spinal cord |
| Ventral Cavity | (Thoracic, Abdominopelvic cavities) - Large, anterior placed - Lined by serous membranes, parietal layer, visceral later |
| Parietal | lines the internal surface of the body wall |
| Visceral layer | covers the external surface of thee organs within cavity |
| Serous Cavity | space between layers |
| Serous Fluid | liquid secreted within a serous cavity that reduces friction with movement of organs |
| Mediastinum | median space, contains the heart , thymus, esophagus, trachea, and major blood vessels |
| Thoracic Cavity | Contains: -Mediastinum - heart enclosed by two layered membrane called pericardium( Parietal, Visceral, pericardial cavity - lungs enclosed with P&V pleura |
| Parietal Pericardium | Outer layer membrane forms sac for heart |
| Visceral Pericardium | Forms the hearts external surface |
| Pericardial Cavity | Central region associated with the heart |
| Parietal pleura | lines internal surface of thoracic wall |
| Visceral pluera | inner layer of membrane, covers external surface of lungs |
| pleural cavity | Space between layers lining the lungs, contains serous fluid |
| Abdominopelvic Cavity | Abdominal, pelvic cavities |
| Abdominal cavity | superior to the pelvic brim of hip bones, contains organs of the digestive system |
| Pelvic cavity | inferior to the pelvic brim, Contains distal part of large intestine, urinary bladder, urethra, internal reproductive organs. |
| Peritoneum | two-layered membrane that lines the abdominopelvic cavity |
| Parietal peritoneum | Outer layer, lines internal walls of abdominopelvic cavity |
| Visceral Peritoneum | Inner layer of membrane, covers surface of most digestive organs |
| Peritoneal Cavity | potential space in abdominopelvic cavity with serous fluid |
| Radiography | x-rays passed through body, absorbed by dense areas(bone, teeth, tumors) that appear lighter in film |
| Ultrasound | Sonography, waves passed through body by transducer; receives signals from ultrasound waves reflecting off internal body structures |
| Digital Subtraction Angiography | (DSA) 3D x-ray technique used to view blood vessels |
| Computed Tomography | CT scan- low intensity X-rays passed through body from many angles: Computer reconstructs 3D image |
| Magnetic Resonance Imaging | MRI- uses electromagnets to affect position and energy of hydrogen atoms |
| Positron Emission Tomography | PT Scan- Radiolabeled glucose used to analyze metabolic state of a tissue/organ |
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