Final answer:
A myogenic heart can generate its own electrical impulses, while a neurogenic heart relies on external stimulation. Examples of myogenic hearts are found in fish, reptiles, and amphibians, while neurogenic hearts are found in mammals, including humans.
Step-by-step explanation:
A myogenic heart refers to a heart that can spontaneously generate its own electrical impulses to initiate contraction without any external influence. Examples of myogenic hearts include the hearts of vertebrates like fish, reptiles, and amphibians.
On the other hand, a neurogenic heart relies on an external stimulator, such as nerves, to generate electrical impulses and initiate contraction. Mammals, including humans, have neurogenic hearts. The electrical impulses in these hearts are initiated by the sinoatrial (SA) node, which is often referred to as the pacemaker of the heart.