Differentiate between Neurogenic heart and Myogenic heart.

Neurogenic Heart and Myogenic Heart are two different types of cardiac systems found in various organisms. They differ in terms of how the heart's contractions are initiated and regulated.

Neurogenic Heart:
A neurogenic heart is primarily controlled by nerve impulses from a centralized nervous system, such as a brain or ganglia. In this type of cardiac system, the nervous system sends signals to the heart muscles, triggering contractions. Neurogenic hearts are typically found in higher vertebrates like mammals, including humans.

The key characteristics of a neurogenic heart include:

Nervous system control: The heart's contractions are initiated and regulated by electrical signals sent from the nervous system.
Higher complexity: Neurogenic hearts are often more intricate in structure due to the integration with a complex nervous system.
Ability to adapt: The nervous system can adjust heart rate and force of contraction based on physiological demands, such as exercise or stress.
Myogenic Heart:
A myogenic heart is controlled by the inherent rhythmic electrical activity of the heart muscle cells themselves. This means that the heart muscle cells have the ability to generate electrical impulses without external nervous system input. Myogenic hearts are found in many invertebrates, such as insects and mollusks, as well as in some lower vertebrates like fish.

The key characteristics of a myogenic heart include:

Intrinsic rhythm: The heart muscle cells possess automaticity, meaning they can spontaneously generate electrical impulses that initiate contractions.
Simplicity: Myogenic hearts are generally less complex in structure since they don't require input from a centralized nervous system for every heartbeat.
Limited adaptability: While myogenic hearts can adjust their rate to some extent, they may have less flexibility in responding to rapid changes in physiological demands compared to neurogenic hearts.
In summary, the primary distinction between neurogenic and myogenic hearts lies in the source of control for initiating cardiac contractions. Neurogenic hearts rely on nerve impulses from a centralized nervous system, while myogenic hearts rely on the inherent electrical activity of the heart muscle cells themselves.