First we will discuss the molecular structure of the epithelial tissue. There are three different types.
Cuboidal
Columnar
Squamous epithelium cell:
basement membrane
The molecular structure of simple squamous epithelium consists of a single layer of flattened cells. Its function is to facilitate the diffusion of gases and small molecules.
nucleus
cytoplasm
cytoplasm
Cuboidal epithelium cell:
nucleus
The molecular structure of simple cuboidal epithelium consists of a single layer of cells that are as tall as they are wide. Cuboidal epithelium lines collecting ducts and tubes which absorb and secrete materials.
width
height
Squaous
Finally, the molecular structure of simple columnar cells consists of a single layer of cells that are
Columnar
Columnar epithelium cell:
basement membrane
Finally, the molecular structure of simple columnar cells consists of a single layer of cells that are taller than they are wide. It lines the small intestine, absorbing nutrients from the lumen of the intestine as well as the stomach, secreting acids and digestive enzymes.
nucleus
cytoplasm
So my skin is made of epithelial tissue, right? What exactly is epithelial tissue?
