Question

Why are heart muscles uninucleate?

Answer 1

Cardiac muscle makes up the heart. It is striated and under the control of the autonomic nervous system.  Cardiac muscle is comprised of uninucleate branching cells connected together by intercalated discs, visible in the mid and high magnification image (three are labeled on the high magnification view).  In the mid-magnifiaction view, you will have to look carefully to see the intercalated discs which allow this muscle type to be positively identified.  Do not confuse these with the striations produced by the highly ordered myofilaments. The intercalated discs appear as darkly staining lines.  In the high magnification images you may note that the cells each have a single nucleus.  

The cardiac muscle on this slide has been teased apart to show the fibers more clearly.  Note that the fibers are branched and that there are interconnections between fibers. 

Answer 2

Cardiac Muscle. Cardiac muscle makes up the heart. It is striated and under the control of the autonomic nervous system. Cardiac muscle is comprised of uninucleate branching cells connected together by intercalated discs, visible in the mid and high magnification image .so heart muscles are uninucleate