The heart can beat continuously without being fatigued because it is composed of________
Answer Details
The heart can beat continuously without being fatigued because it is composed of cardiac muscle.
The heart is a special type of muscle called cardiac muscle. Cardiac muscle is different from skeletal muscle and smooth muscle in that it has unique properties that allow it to contract and relax repeatedly without becoming fatigued.
One of the key differences between cardiac muscle and other types of muscle is that cardiac muscle has its own intrinsic electrical conduction system, which generates electrical signals that coordinate the contraction and relaxation of the heart. This allows the heart to beat continuously without relying on signals from the nervous system, which can become fatigued.
In addition, cardiac muscle also has a high number of mitochondria, which are the energy-producing structures in cells. This allows cardiac muscle to produce energy continuously, enabling it to maintain its rhythmic contractions.
In summary, the heart can beat continuously without being fatigued because it is composed of a unique type of muscle called cardiac muscle, which has its own intrinsic electrical conduction system and a high number of mitochondria.