
thumb|Illustration depicting the layers of the heart wall including the innermost endocardium
via Wikipedia infobox
thumb|Illustration depicting the layers of the heart wall including the innermost endocardium
The endocardium (: endocardia) is the innermost layer of tissue that lines the chambers of the heart. Its cells are embryologically and biologically similar to the endothelial cells that line blood vessels. The endocardium also provides protection to the valves and heart chambers.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).