Which organ is the powerhouse of the cell, the site of cell of cellular respiration

How do the lungs excrete waste material from the body? the lungs push carbon dioxide from red blood cells out of the body through exhalation. the lungs convert poisonous gas into oxygen that the body can use. the lungs push nitrogen into the digestive system so that it can be removed by the body. the lungs protective cells in the body break down gaseous urea.