mitosis is basically when ur cells split to make more so like an example would be your toe "mi-toe-sis" if ur toe nail was cut the cells split to make more so it can grow. meiosis is when two cells divide which reduces the chromosome number by half. making new cells genetically different
hope I helped
The main function of the lungs is the process of gas exchange called respiration (or breathing). In respiration, oxygen from incoming air enters the blood, and carbon dioxide, a waste gas from the metabolism, leaves the blood. A reduced lung function means that the ability of lungs to exchange gases is reduced.