Trace the path from the right femoral vein to the lower lobe of the right lung via the pulmonary artery. I must describe all major structures that it passes by or through. Once I arrive at the lung I must describe the structures that one would see. Narrate how the body combats an invading bactrum. Address both specific and and nonspecific immunity and the cells that are involved in each process. Once that is done cross the alveolar membrane and trace your route out of the body through the nose.