What is the function of the plicae circulares quizlet?
The plicae circulares function to slow down the movement of chyme which allows more time for processing and absorption. In addition, the plicae circulares increase surface area for absorption by about 4x. The villi are fingerlike projections of the mucosa.
What is plicae circulares quizlet?
plicae circulares. circular folds in the mucosa & submucosa of small intestine.
How do the plicae circulares villi and microvilli contribute to the function of the small intestine quizlet?
The function of the plicae circulares, the villi, and the microvilli is to increase the amount of surface area available for the absorption of nutrients. Vitamin B12 and bile salts are absorbed in the terminal ileum. Water and lipids are absorbed by passive diffusion throughout the small intestine.
What modification of the intestinal wall is visible to the naked eye that increases the surface area for absorption of nutrients?
The villi of the small intestine project into the intestinal cavity, greatly increasing the surface area for food absorption and adding digestive secretions.
Where is the Plicae Circulares located?
The plicae circulares are most prominent in the distal duodenum and jejunum. Observe the layers of the wall of the jejunum . Note the absence of glands in the submucosa, which is a characteristic feature of the jejunum.
What structures in the small intestine are lined with capillaries that absorb nutrients quizlet?
Each villus contains a lacteal, a small vessel of the lymphatic system, and capillaries; both absorb nutrients into the bloodstream.
How do the digested products reach the cells around the body?
Digested food molecules are absorbed in the small intestine . This means that they pass through the wall of the small intestine and into our bloodstream. Once there, the digested food molecules are carried around the body to where they are needed.
What is the function of plicae circulares?
The lining of the small intestine consists of a series of permanent spiral or circular folds, termed the plicae circulares, which amplify the organ’s surface area, promoting efficient nutrient absorption.