I think, heart of a cockroach is myogenic. It can stop anytime. That's why even when the heart stops doesn't mean cockroach is dying.
Yes, a toad's heart is myogenic.
myogenic refers to the contraction of cardiac muscle cells.
Myogenic cells are muscle precursor cells that have the ability to differentiate into muscle cells. They play a crucial role in muscle development, growth, and repair. Myogenic cells are typically found in skeletal muscle tissue.
The heart is known to be myogenic because the muscles that contract the heart through a pulse are themselves called myocytes.
So the word "myogenic" refers to a type of cell, a myocyte, that is able to contract by itself, without any nerve stimulation (aka signals from the brain). So if someone refers to a myogenic heart, that person just means that the heart is able to beat on its own, without you willing it to beat. The myocytes within the heart regulate the heart's contractions instead of your brain doing it.
myogenic conduction
Myogenic Conduction
In the human heart, contraction is initiated by a special modified heart muscle known as sinoatrial node. It is located in the right atrium. The SA node has the inherent power of generating a wave of contraction and controlling the heart beat. Hence, it is known as the pacemaker. Since the heart beat is initiated by the SA node and the impulse of contraction originates in the heart itself, the human heart is termed myogenic. The hearts of vertebrates and molluscs are also myogenic.
myogenic
Cardiac / Myogenic
Myogenic conduction