MICROANATOMY

Detailed explanation-1: -Mucosa is the soft tissue that lines the body’s canals and organs in the digestive, respiratory and reproductive systems. It’s also called the mucous membrane. Mucosa has three layers: epithelium, lamina propria and muscularis mucosae.

Detailed explanation-2: -Most mucous membranes contain stratified squamous or simple columnar epithelial tissue. The epithelial tissue sheet lies directly over the layer of loose connective tissue called lamina propria.

Detailed explanation-3: -The lamina propria is composed of noncellular connective tissue elements, i.e., collagen and elastin, blood and lymphatic vessels, and myofibroblasts supporting villi. However, the main characteristic of the lamina propria is to contain numerous immunologically competent cells as well as nerve endings.

Detailed explanation-4: -Underneath the epithelium, there is a layer of connective tissue termed lamina propria composed of blood vessels, nerves, fibroblasts, macrophages, mast cells, and inflammatory cells fibers all immersed in an amorphous substance formed by proteoglycans and glycoproteins.