explain nodal musculature in human heart?????
and why heart considered AS auto excitable??
Answers
Conduction of Heart Beat: The heart is made of cardiac muscles. The walls of the ventricles are much thicker than the walls of the atria. A specialized cardiac musculature; called the nodal tissue is also distributed in the heart
The Heart muscles are involuntary in their contraction ability. They are excited by special node called as sino atrial node(SA node), a place were the contarction starts. Also attaching an image which gives you an clear understanding go throuugh it.
Nodal musculature is a special type of musculature that is spread throughout the heart tissue.
EXPLANATION:
This modal musculature enables the contraction and the relaxation process of the heart. The nodal musculature consists of the "Sino-Atrial Node" (SA Node), the "atrio-ventricular node" and the Bundle of this which is present in the heart. The AS node or the SA node is an auto excitable, involuntary node because it is responsible for setting the natural rhythm of the heart.