Humans Are Unique in That They Have The

question 86

Multiple Choice

Humans are unique in that they have the:

• A) largest brain of any animal species.
• B) most complex spinal cord of any animal species.
• C) largest brain to body size ratio of any living animal.
• D) most advanced nervous system of any living animal.

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Definitions:

Fibrillation

A rapid, irregular, and unsynchronized contraction of muscle fibers, particularly in the heart.

Ventricles

The two lower chambers of the heart, or the central cavities in the brain.

Capillaries

The smallest blood vessels in the body, connecting arteries to veins, which facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrient and waste substances between blood and surrounding tissues.

Arteries

Blood vessels that carry oxygen-rich blood away from the heart to the body.