Model of upper human torso focuses on study of heart and lungs in the respiratory system. Lungs, trachea, and alveoli are enlarged and shown in cross section. The 18" x 24", three-dimensional model is of lightweight, sturdy construction. Group lessons may be best prepared and delivered if the teacher uses the Control Booklet of the Anatomy Classified Nomenclature Exercise (see SKU: SC-A48) which is also designed to provide individual self-paced activities for the students. Grades 3-12.