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.
In humans, the heart is located in the chest cavity, behind the breastbone, between the lungs and above the diaphragm. The human heart is the organ responsible for pumping oxygen and blood around the body. Continue Reading.