The walls of the small intestine are folded, and within the folds are fingerlike projections called

Name: The walls of the small intestine are folded, and within the folds are fingerlike projections called
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The small intestine has folds called rugae, but it is the fingerlike projections within the folds (villi) that increase surface area for absorption. Nephrons are structures in the kidneys that filter blood, and cilia are hair-like structures on cells that help with movement.

The Walls of the Small Intestine Are Folded, and Within