The heart is a muscular, conical and dark red coloured organ that act as a pump of the blood circulatory system in our body.In man, the heart weighs about 0.43 % of the body.The heart is made up of special type of muscles known as cardiac muscles. These muscles contract with considerable force, squeezing the blood out into the arteries which carries it to the different body parts. A single cycle of circulation of blood into the heart is known as cardiac cycle.
The heartbeat of normal adult human being is ________________________ . | |||
Right Option : B | |||
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Which of the following are correct ? (a) Cardiac cycles is the sequence of alternating contraction and relaxation of the atria and ventricles of the heart to pump blood through out the body. It lasts approximately 0.8 seconds. (b) The heart beats non stop throughout one’s life. | |||
Right Option : C | |||
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In the cardiac cycle both atria and ventricle relaxes for a short period. This is known as _____________________ . | |||
Right Option : C | |||
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