BIO210Y5 Lecture Notes - Lecture 1: Mediastinum, Pleural Cavity, Pelvic Cavity

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7 Jun 2018
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BIO210Y
Lecture 1B Foundations of our
Body Organization
Body Cavities
Essential Functions of Body Cavities
1. Protect organs from shocks and impacts
2. Permit changes in size and shape of internal
organs
During development, the ventral body cavity subdivides into the thoracic cavity
and the abdominopelvic cavity.
Viscera refers to the internal organs that are partially or completely enclosed by
Serous membranes line the walls of the body cavities and cover the surface of
the viscera
Consist of parietal layer and visceral layer
• Parietal layer  lines cavity
• Visceral layer  covers organ
Pericardial Cavity
The Thoracic Cavity
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