Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA. DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules.
The heart is a vital organ located in the center of the chest with a slight tilt to the left. Using rhythmic muscle contractions, it circulates blood through veins and arteries, which supplies tissues with oxygenated blood and disposes waste.
The heart is situated in the mediastinum, which is a space between the lungs in the approximate center of your chest behind your breastbone. The heart is actually located more â¦ to the left, though, and so the reason you'll feel it beat harder on the left side is because that's where it is.