The Pulmonary Capillaries

question 146

Multiple Choice

The pulmonary capillaries

• A) are closely associated with alveoli but do not fuse.
• B) fuse with the alveoli to facilitate gas exchange.
• C) bring oxygenated blood back to the heart.
• D) bring deoxygenated blood back to the heart.
• E) fuse with the alveoli to facilitate gas exchange, and bring oxygenated blood back to the heart.

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Definitions:

Muscle Cells

Specialized cells designed to contract and cause movement; can be classified as skeletal, cardiac, or smooth muscle cells.

Muscle Fibers

Individual cells of muscles that are long, cylindrical, and capable of contraction to facilitate body movements.

Spindle-Shaped Cells

Cells that taper at both ends and are found in smooth muscle tissues and some types of soft tissue.

Skeletal Muscle

A type of striated muscle tissue that is voluntarily controlled, responsible for movement of the skeleton.