The lat pull-down is a muscular resistance exercise that primarily works which muscle group? a. calf muscles b. upper back muscles c. hamstring muscles d. quadricep muscles if u know all the answers to unit 8 lesson 4 pefound final exam let me know

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.