The Pulmonary System chart takes us through the interaction of two body systems - the vascular and respiratory systems. Moving from the human body level to the organ level all the way to the cellular level, The Pulmonary System describes the process and structures of respiration and gas exchange. Heavy gauge 3ml lamination with sealed edges and two metal eyelets for hanging makes chart highly durable. Write-on/wipe-off with dry erase marker (not included).