Diseases, Conditions, Syndromes

Why does COVID-19 seem to spare children? New study offers an answer

Researchers at Vanderbilt University Medical Center (VUMC) and their colleagues have determined a key factor as to why COVID-19 appears to infect and sicken adults and older people preferentially while seeming to spare younger ...

Diseases, Conditions, Syndromes

Why are some COVID-19 infected people asymptomatic?

Researchers worldwide have been surprised to see that individuals can be infected with the SARS-CoV-2 virus—the virus that produces COVID-19—without showing symptoms. Since these individuals expose others to infection ...

Medical research

Creating an alternative to animal experiments

The human intestine is vital for both digestion and absorbing nutrients as well as drugs. For any type of research that involves intestines, scientists require research models that reflect the physiological situation inside ...

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Epithelium

In biology and medicine, an epithelium is a tissue composed of cells that line the cavities and surfaces of structures throughout the body. Many glands are also formed from epithelial tissue. It lies on top of connective tissue, and the two layers are separated by a basement membrane.

In humans, epithelium is classified as a primary body tissue, the other ones being connective tissue, muscle tissue and nervous tissue.

Epithelium is often defined by the expression of the adhesion molecule e-cadherin (as opposed to n-cadherin, which is used by cells of the connective tissue).

Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport and detection of sensation and they commonly as a result present extensive apical-basolateral polarity (e.g. different membrane proteins expressed) and specialisation.

This text uses material from Wikipedia, licensed under CC BY-SA