User talk:Explorando science

Electrical Activity of Heart
Cardiac muscles are Autoexitable [Autorhythmic]

The range of autoexitability ranges between -70mV to +30mV of generating action potential is brought about by cardiac muscles. The patches in embryonic heart performs the function of generating action potential.

Myogenic Heart - Heart beat is initiated by heart muscles. In non-chordates neuron sends impulses to heart & generates AP then it results in heart beat. In myogenic heartthe heart is Autorhythmic these patches gets developed during the course of development & finally gets developed into node called sino atrial node present in upper right corner of the right atrium generates AP 70-75 times /minute = heart beat. Information of SA node passes to AV node & both atria. Impulses from SA node to atria results in contraction of atria. Finally impulses of SA node reaches AV node. The electric current is generated from SA node So SA node is called Pacemaker of heart. Bundle of his is located in interventricular septum. Purkinge fibres act as fast conducting impulses & helps in ventricular contraction. So 1st atrial contraction is seen & 2nd ventricles undergo contraction cuzz above atria lies SA node that conducts electrical impulses then these impulses enters to ventricles.

Specialised nodal tissues are present- modified cardiac muscles which are exitable & generate AP the presence of valve between atria & ventricle which is formed by connective tissues acts as insulator for conduction of nerve impulses. Explorando science (talk) 03:41, 2 January 2022 (UTC)

Knows about formation of patches in heart Explorando science (talk) 06:50, 3 January 2022 (UTC)