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A&P
Body Cavities & Body Planes
Term | Definition |
---|---|
Cranial Cavity | includes: brain, part of major Dorsal (back) cavity |
Vertebral Cavity | A.K.A. "Spinal" Cavity, part of major Dorsal (back) cavity |
Thoracic Cavity | A.K.A "chest" cavity. includes: Superior & Inferior mediastinum, Pleural cavity, Pericardial cavity. Part of major Ventral (front) cavity |
Pleural Cavity | contains the lungs, included in Thoracic (Chest) cavity. Part of major Ventral (front) cavity and Thoracic. |
Pericardial Cavity | cavity within the mediastinum. (lower chest) Party of major Ventral (front) cavity within Thoracic. |
Mediastinum | fibrous tissue forms a wall around the mediastinum, completely separating it from the pleural cavity. Contains heart, lungs, esophagus, trachea, etc. Superior and Inferior regions. Part of Ventral (front) cavity & Thoracic. |
Abdominal Cavity | A.K.A "upper portion" of Abdominopelvic cavity; Abdomen/Abdominal. Includes stomach, spleen, liver, gall bladder, small intestine. Part of Ventral (front) cavity. |
Pelvic Cavity | A.K.A. "lower portion" of Abdominopelvic Cavity & major Ventral. Includes part of large intestine, urinary bladder, reproductive organs. |
Thoracic & Abdominopelvic Cavities are separated by the.. | Diaphragm |
Serous Membrane | surrounds organs by two layered membrane which secrete thing, watery fluid lubricating organs as they rub against each other & walls of cavities. |
Parietal layer | Part of Serous Membrane. Outer layer of membrane that forms lining against inner wall of each cavity. |
Visceral layer | Part of Serous membrane. inner layer of membrane that covers surface of each organ. |
Body can be divided into 3 types of planes: | Sagittal, Frontal (Coronal), Transverse |
Sagittal/Midsagittal Plane | lengthwise plane running from front to back; if it runs exactly in midline, results in equal & symmetrical left/right halves. |
Coronal/Frontal Plane | lengthwise plane running from side to side; divides body into anterior and posterior portions. |
Transverse/Horizontal Plane | crosswise plane; divides body into upper/lower parts. |