NEET BIOLOGY

Detailed explanation-1: -The SA node has the inherent power of generating a wave of contraction and controlling the heartbeat. Hence, it is known as the pacemaker. Since the heartbeat is initiated by the SA node and the impulse of contraction originates in the heart itself, the human heart is termed myogenic.

Detailed explanation-2: -Solution : (1) The heart shows autorhythmicity because the impulse for its rhythmic movement develops inside the heart. Such heart is called myogenic. <br> (2) Some of the cardiac muscle fibres become autorhythmic (self-excitable) and start generating impulses during development.

Detailed explanation-3: -Myogenic heart is the one where the impulses for contraction and relaxation of muscles of heart is generated and transmitted by specialised cardiac muscles. Human heart is myogenic.

Detailed explanation-4: -Myogenic heart is found in vertebrates. This kind of heart is called a human heart which can beat of its own and doesn’t need any external impulse. The impulse is generated by a pacemaker present inside the heart.

Detailed explanation-5: -The myogenic heart is the heart that beats by specialized muscle cells.