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Body Cavities

Body Cavities. Contain the visceral organs. Axial portion. Head Neck Trunk. Appendicular portion. Arms Legs. Axial cavity divided:. Dorsal c. Cranial: skull, brain Spinal: spinal cord. Ventral c. Thoracic: above the diaphragm Abdominopelvic: below diaphragm to floor of pelvis.

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Body Cavities

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  1. Body Cavities Contain the visceral organs

  2. Axial portion • Head • Neck • Trunk

  3. Appendicular portion • Arms • Legs

  4. Axial cavity divided: • Dorsal c. • Cranial: skull, brain • Spinal: spinal cord

  5. Ventral c. • Thoracic: above the diaphragm • Abdominopelvic: below diaphragm to floor of pelvis

  6. Abdominopelvic • Abdominal: stomach, liver, gall bladder, spleen, small intestine, and most of the large intestine

  7. Pelvic: end of large intestine, urinary bladder, internal reproductive organs.

  8. Smaller cavities within the head • Oral: teeth, tongue • Nasal: paranasal sinuses, right and left divided by the septum

  9. Middle ear: middle ear bones • Orbital: eyes, associated skeletal muscles and nerves

  10. Membranes • Pleural membranes: associated with the lung • Parietal pleura: line the lung compartments

  11. Visceral pleura: membrane covering the lung • Pleural cavity: space between the pleura

  12. Serous fluid: substance within the pleural cavity • Mediastinum: portion of thoracic cavity separating the heart, esophagus, trachea, and thymus from the lungs.

  13. Pericardial membranes: • Visceral pericardium: membranes surrounding the heart • Parietal pericardium: second layer, more fibrous

  14. Pericardial cavity: space between • Abdominal cavity: peritoneal membranes • Parietal peritoneum: lines the walls of the cavity

  15. Visceral peritoneum: covers the internal organs • Peritoneal cavity: space between

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