Essay on Epithelial Tissue

1250 Words5 Pages
Every organ in the human body is composed of one or more tissues. The study of these tissues is known as histology. It is because of histology that the structure of organs can be researched and understood. Since organs are composed of tissues, it is important to understand each tissue type, their structure, their location, and their functions to better understand how each organ operates within the human body. Tissues are composed of groups of cells that have similar shapes and functions. There are four main types of tissue found in the human body: epithelial tissue, connective tissue, muscular tissue, and nervous tissue. Each tissue has unique characteristics that differentiate them from one another. Epithelial tissue covers the…show more content…
Simple epithelia are composed of a single layer of cells which are mostly concerned with absorption, secretion, and filtration because they are generally thin layers which do not offer great levels of protection (Hoehn, et al., 2007, p. 120). These simple epithelia can be found in the shape of simple squamous, simple cuboidal, simple columnar and psuedostratified columnar. Simple squamous epithelium are distinguished by the flattened cells with a disc-shaped nucleus and can be found in the kidneys, lungs, lining of heart, blood and lymphatic vessels, and the ventral body cavity. Simple cuboidal epithelium are distinguished by the cube-like cell shape with large spherical nuclei shapes and can be found in the kidney, small glands and the surface of the ovaries. Simple columnar epithelium are distinguished by the column shaped cells that house oval shaped nuclei inside and can be found in the gallbladder, digestive system, glands, and uterus. The psuedostratified columnar epithelium can still be classified with the simple epithelia because it too is a single layer of cells. The psuedostratified columnar epithelium differs from the simple columnar epithelium because the cells in the psuedostratified columnar epithelium are not all the same height, do not reach the surface and the nuclei are found on different levels (Hoehn, et al., 2007, p. 122).

More about Essay on Epithelial Tissue

Open Document