Question

Which tissue type lines the intestinal tract? What accessory structures significantly increases the surface area of this epithelium?

Which tissue type would you expect to find lining the alveoli of the lungs? Why?

Which tissue type would you expect to observe cushioning, protecting and insulating the viscera in the abdominal cavity?

Answer 1

- intestinal epithelium lines the intestinal tract. The intestinal epithelium is a single layer that form the luminar surface of both the small and large intestine of GI tract

-Microvilli are the cell surface modifications which increase cell surface without significant increase in the cell size. Microvilli often seen in organs where epithilum plays a major role in absorption of molecules

- Simple Squamous Epithelium

Alveoli are seperated from one another by thin alveolar walls each alveoli is lined by simple squamous epithelium exceedingly thin to facilitate diffusion of oxygen while still forming an epithelial barrier between the outside air and the internal body fluids

- the abdominal cavity is lined with protective membrane termed as Peritoneum, the serous membrane that forms the linings of abdominal cavity and covers most of the abdominal organs. The viscera are covered by visceral peritoneum.