One cardiac cycle ( heartbeat) takes approximately how long to complete?

The answer is 0.8 second. A cardiac cycle or also known as a heartbeat approximately takes about 0.8 second to complete one cycle. A heartbeat is fast since it is a muscle that pumps blood throughout the body. The Cardiac Cycle has two phases, first the Diastole phase, wherein the heart ventricles are relaxed, while the heart fills with blood, second is the systole phase, wherein the ventricles contract and pumps the blood out from the heart and takes it  to the arteries to be spread all around the body.

gametes or germ cells are haploid cells (example: sperm and ova) containing only one set (or n) number of chromosomes and autosomal or somatic cells are diploid cells containing 2n number of chromosomes.

some of your causes might be acidic rain or natural wildfires that cause the parks to be degraded

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