What is the main function if the respiratory system? what disease can affect it? a. carry nutrients to body cells: heart disease b. distribution of oxygen though out the body : emphysema c. the preventation of disease caused by pathogens: autoimmune disease d. elimination of wastes from the body ; colon cancer

Jessica is a friend dislodge a piece of meat from her throat. she delivers five blows on her friend’s back with her fist and then gives him five abdominal thrusts. is jessica doing the procedure correctly? 1 no, she should use the heel of her hand for the blows. 2 no, she should use the side of her hand for the blows. 3 no, she should use her elbows to deliver the blows. 4 no, she should use a tennis ball to deliver the blows.