Which organelle is most prominent when looking at cheek cells under the microscope?

 A. The lungs push carbon dioxide from red blood cells out of the body through exhalation.

The lungs are the two vital organs of the body their function is to purify air containing carbon dioxide and lacking oxygen into oxygenated air. The movement of the lungs in the inhalation of oxygen and exhalation of carbon dioxide is controlled by the diaphragm. Carbon dioxide is a metabolic waste which needs to be expel out from all the cells of the body hence, the lungs helps in this process.