In the Middle of the Thoracic Cavity Is a Region

question 133

Multiple Choice

In the middle of the thoracic cavity is a region occupied by the heart, great vessels, thymus, esophagus, and trachea called the

• A) pleural space.
• B) pericardial space.
• C) mediastinum.
• D) cardiac notch.
• E) ventral cavity.

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Definitions:

Rods

Photoreceptor cells in the retina of the eye that provide night vision and peripheral vision by detecting brightness and shades of gray.

Cones

Photoreceptor cells in the retina of the eye that are responsible for color vision and function best in relatively bright light.

Color Blind

A condition characterized by the inability to see colors in the usual way, affecting the perception of colors.

Humans

Members of the species Homo sapiens, characterized by their ability to use complex language, reason, and create complex social structures.