The Endocardium layer secretes chemicals that help to regulate ionic environments and strength of contraction and serve as powerful vasoconstrictors.
The endocardium 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.
The endocardium is composed of simple squamous epithelial cells which form the inner lining of the heart chambers. The endocardium connects to blood vessels that supply the heart muscle and contributes to the regulation of heart contractions.
Learn more about the endocardium layer here: brainly.com/question/13588266
#SPJ2
