Dorsal and ventral cavities are sealed closed off from the external environment

Dorsal and ventral cavities are sealed closed off

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Dorsal and ventral cavities are sealed (closed off) from the external environment Dorsal Body Cavity Houses and protects nervous system Two subdivisions: Cranial cavity Encases brain Vertebral cavity Encases spinal cord Ventral Body Cavity Houses and protects the internal visceral organs ( viscera ) Can be divided into two subdivisions (separated by diaphragm) Thoracic cavity Abdominopelvic cavity Thoracic cavity subdivisions Two pleural cavities Each surround a lung Mediastinum
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Contains pericardial cavity Surrounds some thoracic organs Pericardial cavity Encloses heart Abdominopelvic cavity subdivisions Abdominal cavity Contains stomach, intestines, spleen, and liver Pelvic cavity Contains urinary bladder, reproductive organs, and rectum Membranes in Ventral Body Cavity Thoracic and abdominal body cavities are lined by thin, slippery, double-layered membranes called serous membranes. These membranes adhere to the outer surface of the organs or “viscera”, and then double-back on themselves to line the body cavity wall. Serous membrane or serosa Thin, double-layered membranes Parietal serosa - lines internal body cavity walls Visceral serosa - covers internal organs (viscera) Layers separated by slit-like cavity filled with serous fluid Fluid secreted by both layers of membrane Serous Membranes Named for specific cavity and organs with which associated
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  • Fall '09
  • MILTON
  • Physiology, Anatomy, Anatomical terms of location, ventral body cavity

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