Which of the Following Statements Regarding Circulatory Systems Is True

question 29

Multiple Choice

Which of the following statements regarding circulatory systems is true?

• A) The smallest blood vessels in the body are veins.
• B) A circulatory system is necessary in any animal whose body is too large or too complex for vital chemicals to reach all parts of the body by diffusion.
• C) Materials are exchanged directly between the blood and body cells.
• D) Veins carry blood away from the heart to body organs and tissues.

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Definitions:

Referred Pain

Pain that arises in one of the internal organs but is felt on the surface of the body.

Internal Organs

The group of organs located within the main cavities of the body, such as the heart, lungs, liver, and kidneys, essential for various bodily functions.

Rapidly Adapting Receptor

Body sensory receptor that responds briefly to the onset of a stimulus on the body.

Meissner's Corpuscles

Specialized nerve endings in the skin sensitive to light touch and texture.