1.16 - Surface Area to Volume Ratio

• Which organisms have a larger surface area to volume ratio? Smaller or larger?

  Small Organisms
• What are two examples of exchange surfaces in humans and describe their function.

  Alveoli (Lungs) - allow oxygen and carbon dioxide to diffuse into and out of the body/bloodstream

  Villi (Small Intestine) - allow nutrients to be absorbed from the small intestines into the bloodstream