Which of the following statements about the internal transport of materials in large animals is true?
A) Since diffusion works well only over short distances, nearly all animal body cells lie extremely close to a blood vessel.
B) Diffusion is the main mechanism large animals use to transport materials within their systems.
C) The exchange of materials between blood and the surrounding cells occurs in arteries.
D) The heart contains the surfaces over which most gas exchange occurs.

Question

Quizplus · Accepted Answer

Diffusion works well only over short distances, so animal body cells must lie extremely close to a blood vessel for efficient exchange of materials. This is why nearly all large animals have circulatory systems that transport nutrients, gases, and wastes to and from their cells.

Which of the Following Statements About the Internal Transport of Materials