Multicellular organisms use cell division my ptosis for growth in the maintenance and repair of cells and tissues there are a few cells in the body that did not undergo mitosis most somatic cells divide regularly some more than others single celled organisms may use cell division as a method of a reproduction regardless of the reason for my ptosis the process ensures genetic continuity consider the model of the cell cycle explain the purpose of the areas labeled checkpoint in the cycle all but one could apply

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explanation:

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the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

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