Provide a short response to the following question.
How does the structure of the small intestine support absorption?
a. Even though it is narrow, the small intestine is the __________ part of the alimentary canal.
b. The small intestine extends up to nearly ________ in length.
c. Villi are tiny __________ projections that increase the surface area for absorption.
d. Villi are found throughout the small intestine but are absent in the __________.
e. Villi are structures that __________ the surface area inside the small intestine.
f. The small intestine is the site where __________ are fully digested.