Villi

The transcript discusses the role of villi in increasing surface area, focusing on intestinal villi. It describes their structure, resembling loops on a towel, and their function in enhancing the absorbency of the intestinal wall.

What is the primary role of organs that increase surface area?

• To regulate body temperature

• To improve the absorption of nutrients

• To protect against infections

• To enhance the body's structural integrity

Where are the most well-known villi located?

• In the lungs

• In the heart

• In the gut

• In the brain

How long are intestinal villi typically?

• Half to 1 mm

• 2 to 3 cm

• 5 to 10 mm

• 1 to 2 cm

What is the appearance of intestinal villi compared to?

• Feathers on a bird

• Scales on a fish

• Loops on a towel surface

• Bristles on a brush

What is the main function of intestinal villi?

• To secrete digestive enzymes

• To increase the intestinal wall's absorbency

• To transport nutrients to the liver

• To protect the intestines from bacteria