How columnar epithelium present in respiratory tract is different from that present in the inner lining of small intestine
Answers
The epithelium that is found in the stomach has a column-like shape. This type of epithelium cell is found in the organs of the digestive system.
Complete answer: A single layer of columnar cells that are attached to the basement membrane, with oval-shaped nuclei present in the basal region is known as a columnar epithelial cell. In humans, simple columnar epithelium cells are mostly seen in the digestive tract including organs like the stomach, small intestine, and large intestine.
It is also seen in the uterus.
Simple columnar epithelium can be divided into two categories – ciliated and non-ciliated or glandular.
The ciliated columnar epithelium has tiny hairs that help in the movement of mucus in the respiratory tract.
The majority of the respiratory tree, from the nasal cavity to the bronchi, is lined by pseudostratified columnar ciliated epithelium. The bronchioles are lined by simple columnar to the cuboidal epithelium, and the alveoli possess a lining of thin squamous epithelium that allows for gas exchange.
The non-ciliated columnar epithelium is also found in the inner lining of small intestines and the bladder. it also lines the minor ducts of several glands.
Respiratory epithelium, or airway epithelium, is a type of ciliated columnar epithelium found lining most of the respiratory tract as respiratory mucosa, where it serves to moisten and protect the airways.
The inside of the trachea is lined with pseudostratified ciliated columnar epithelium, which is continuous with the larynx. This epithelial layer has mucus producing goblet cells that are only visible at high magnification.
In simple columnar epithelium, the nucleus of the tall column-like cells tends to be elongated and located in the basal end of the cells. ... Pseudostratified columnar epithelium is found in the respiratory tract, where some of these cells have cilia.