endothelium
/ˌɛndoʊˈθiːliəm/
noun
- The thin layer of cells that lines the inside of blood vessels, lymph vessels, and the heart.
- Smoking can damage the endothelium and increase the risk of stroke.
- A healthy endothelium is essential for proper blood flow and preventing clots.
- The endothelium releases substances that help relax blood vessels.
Synonyms