A relief model of the respiratory system, including the oronasal cavity, larynx and trachea, primary bronchi and bronchial tree. The upper respiratory tract is sectioned along the medial sagittal plane. An alveolus with blood vessels (about 150X life size) is shown with excellent internal detail. Mounted on base. Size: 53 x 38 x 6cm Weight: approx. 2.2kg