describe how a cell acquires the O2 the cell needs for its metabolic processes and how a cell gets rid of the CO2 that is doesn't need and can actually be harmful to the cell?

Cells absorb oxygen and release CO2 via the bloodstream. Please find below detailed explanation

Explanation:

Oxygen and carbondioxide (CO2) are the major gaseous substances involved in celluar respiration. Aerobic celluar respiration, which is the process by which cells obtain energy, requires oxygen to occur. The oxygen initially gets breathed in as a constituent of air, which later passes through air sacs and gets attached to hemoglobin in red blood cells. Hemoglobin transports oxygen throughout the cells of the body.

After the process of celluar respiration is done, carbondioxide (CO2) is released back into the bloodstream, which carries it to the lungs. The CO2 is released when we breathe out.