Definition

A type of tissue made up of flat cells that forms a protective layer lining certain body cavities in vertebrates, such as the abdomen and chest.

Example

The surgeon carefully examined the mesothelium during the operation to ensure there were no abnormalities.

Conversation

Have you ever heard about the mesothelium?

I think I read something about it in biology class.

Yeah, it's the layer that lines the body cavity in embryos.

Right! It’s interesting how it develops into different tissues.

Synonyms & Antonyms

Root Explanation

Mesothelium → It is formed from "meso-" (from Greek "mesos", meaning middle) and "thelium" (from Greek "thēlē", meaning nipple or tissue). The word refers to the middle layer of tissue that lines certain cavities in the body.

Memory Tip

Think of 'middle' ('meso-') tissue ('thelium') that lines body cavities — that's what mesothelium means.

Visually Confused Words