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The heart muscle, myocardium, contracts when in the systolic phase, which is the part when the blood is being pushed out of the left ventricle into the aorta. The wall of the left ventricle tends to be much thicker than than the right ventricle because of the amount of of pressure it exerts the oxygen rich blood into the aorta. Seeing as though the heart is a muscle, if it is worked more, it gets stronger. The myocardium is an involuntary muscle that is controlled by both intrinsic and extrinsic factors.
What else can I help you with?
Is the heart involuntary or voluntary?
the heart is and involuntary muscle because you cannot contract the muscle.
Why do they say that the heart is a muscle?
Because your heart is a muscle, a cardiac muscle. a muscles job is to contract an that is exactly what the heart does, it contracts to pump blood.
What muscle contract without voluntary thought?
heart
Do all cardiac muscle fibers all contract at the same time?
No. The heart muscle contracts in sections, first the top (atrium) then the bottom (ventricle). But when it is working properly, the heart muscle fibers contract together in large groups.
What type of muscle is a heart?
The heart or "Cardiac muscle" is myogenic meaning that it will independently contract without a stimulus. The nerve impulses in the heart are merely to regulate the natural beat of the heart.
What Muscle cause contractions of the heart?
the lungs and the legs contract the heart for regular pulse that murmurs
What muscle such as the heart muscle does its job without thinking about it?
Involuntary muscles contract subconsciously.
What are myogenic 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.
Does a heart run on electricity?
Yes. Electrical signals to the cardiac muscle causes the heart to relax and contract.
What is the muscle when the heart forces blood?
The ventricles are the lower heart chambers that contract to pump blood. The upper chambers, atria, also contract, but to a lesser degree.
How do you use the word fibrillation in a sentence?
The E.K.G. showed his heart was in fibrillation.Fibrillation of the heart muscle means the heart cannot contract effectively.If doctors cannot stop fibrillation, the heart muscle can stop working.
Is the heart a voluntary muscle?
No, the heart is an involuntary muscle. You can affect your heart rate through your nervous system but you cannot contract and relax at will your heart muscle as you would your bicep or other voluntary muscle.
