no

syncytium.

cardiac muscle operates as a functional syncytium, although it's not a true syncytium, because each myocardial cell has its own nucleus within its own membrane. Cardiac muscle functions as a syncytium due to the presence of low resistance connections between adjacent cells, and when an action potential is generated, the atria or the ventricle contract together.

A cells with many nuclei is often called a syncytium. The normal cell structure for many types of fungi is a syncytium.

visceral smooth muscles cells function together as ONE (functional syncytium)

multiunit smooth muscle act independently.