BODY CAVITIES + SEROSA UPDATED

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Last updated 8:30 PM on 9/5/26
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5 Terms

1
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<p><strong>DORSAL CAVITY</strong></p>

DORSAL CAVITY

  • posterior (back) + encased in bone

  • cranial cavity (brain)

  • vertebral cavity (spinal cord)


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<p><strong>VENTRAL CAVITY</strong></p>

VENTRAL CAVITY

  • anterior (front) + houses viscera (major organs)

  • lined with serous membranes

  • thoracic cavity (superior to diaphragm)

  • abdominopelvic cavity (inferior to diaphragm)


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<p>THORACIC SUBDIVISIONS</p>

THORACIC SUBDIVISIONS

  • 2 pleural cavities (each has a lung): serosa= parietal + visceral pleura

  • Mediastinum: media space containing thymus, pericardial cavity, esophagus and trachea

  • Pericardial cavity: heart, serosa: parietal + visceral pericardium


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<p>ABDOMINOPELVIC SUBDIVISIONS</p>

ABDOMINOPELVIC SUBDIVISIONS

  • Abdominal cavity: superior to pelvic brim of hip bones. Contains stomach, most digestive organs, liver, spleen, kidneys, ureters

  • Pelvic cavity: inferior to pelvic brim. Contains bladder, distal large intestine, internal reproductive organs

  • Serosa: parietal + visceral peritoneum


5
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SEROSA RULE

  • Parietal: lines wall of the cavity

  • Visceral: covers the surface of the organ

  • Serous cavity + fluid: potential space between layers containing serous fluid to reduce friction