Sectional Anatomy Describe three-dimensional structures. Sectional Planes: Transverse Planes- divide the body into superior/inferior sections. Frontal Planes - divide the body into anterior and posterior sections. Sagittal Planes-divide the body into left and right sections. Exactly equal halves- Midsagittal Section
Sagittal Plane - Organs Labeled This animation (596K; or 350K Quicktime version) travels from the right side to the left, and back again (and again..). You can see the entire head and neck, the thorax or chest, and part of the abdomen. Quicktime version Head and Neck Brain: The area occupied by the brain is shown in yellow. Thorax Lungs: Follow the path of the right and left lungs (in blue). Heart: Note the location of the heart (in red) with respect to the lungs. The heart resides primarily on the left side of the body. Abdomen Liver: Follow the green outline of the liver. Notice that most of the organ resides on the right side of the body. A thin region extends to the left side, running beneath the diaphragm. Gastrointestinal (GI) Tract: The stomach, small intesine and colon are indiscriminantly labeled in purple. Note how the loops of bowel travel across the abdomen. Kidneys: Notice the more lateral positioning of the kidneys. Be certain to watch for both kidneys - one on the left side, and one on the right side.
Body cavities are internal chambers holding vital organs –Cavities protect vital organs –Cavities allow organs to change in shape and size Two body cavities –Dorsal body cavity includes the cranial cavity and the spinal cavity –Ventral body cavity includes the thoracic cavity and the abdominopelvic cavity Body Cavities
The thoracic cavity contains the heart and lungs. It is subdivided into the left and right pleural cavities and the mediastinum (pericardial cavity) –Each pleural cavity contains one lung lined by the visceral and parietal pleura (serous membranes) –The mediastinum (pericardial cavity) contains the pericardium, another serous membrane that surrounds the heart Thoracic Cavities
The abdominopelvic cavity is lined by the peritoneum (serous membrane) –The abdominal cavity extends from the diaphragm to the superior margins of the pelvis liver, stomach, spleen and most of the large intestine Abdominopelvic Cavity
–The pelvic cavity is bordered by the pelvis, with a floor of muscle reproductive organs, urinary bladder and the final portion of the large intestine Abdominopelvic Cavity