The main role of phospholipids in living cells is to... Store energy for future nutritional leads
O Make the cell wall in plant cells
O Form cell membranes in all eukaryotic cells
O Make insect exoskeletons

Form cell membranes in all eukaryotic cells

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases.