What is the purpose of interphase in the cell cycle?What occurs during G1 and G2 in the cell cycle?

During interphase, the cell copies its DNA in preparation for mitosis. Interphase is the 'daily living' or metabolic phase of the cell, in which the cell obtains nutrients and metabolizes them, grows, replicates its DNA, and conducts other "normal" cell functions. In G1 the cell grows in preparation for DNA replication, and certain intracellular components, such as the centrosomes undergo replication. In G2 division occur.

Explanation:

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.