What Is the Mediastinum

question 48

Multiple Choice

What is the mediastinum?

• A) Membranous sac surrounding the heart and great vessels
• B) Middle layer of muscle fibers constituting the heart
• C) Point of division of the trachea into the bronchi
• D) Structure separating the right and left thoracic cavities

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Definitions:

Conditional Probability

The probability of an event occurring given that another event has already occurred, often calculated to take into account prior knowledge.

Aromatic

A class of compounds characterized by the presence of one or more benzene rings which have delocalized pi electrons.

Antiaromatic

A type of cyclic compound that is destabilized by the delocalization of its electrons, failing to meet the criteria for aromatic stability.

Nonaromatic

Organic compounds that do not meet the criteria for aromaticity, lacking the special stability of aromatic systems.