Organ System Integration

Pig's cells need Oxygen to function. The musculoskeletal system and the respiratory system work together to bring Oxygen to cells. The diaphragm, a muscle of the musculoskeletal system, pulls down on the lungs, a component of the respiratory system, creating negative pressure inside the lungs, filling them with air (which contains Oxygen), which is then transported to cells by the blood of the circulatory system. Another problem which this organ duo solves is moving cell waste out of the body. As the diaphragm relaxes, the pressure inside the lungs forces waste CO2, which the blood brought to the lungs, up the trachea and out of the body. 

http://1.bp.blogspot.com/_sEJAOvZB4Kg/TNiV5FP1QlI/AAAAAAAAAoI/8rlrWo14AYs/s1600/Experiment+10+-+Dissection+of+a+Fetal+Pig+(Basic+Structures)+(3).jpg

http://www.vancouverhumanesociety.bc.ca/wp-content/uploads/Piglet.jpg