Human heart. Plastic model mounted on a stand. The plastic model "Heart" is used as a demonstration material in 9 forms of comprehensive school in the course of biology on section " the Person and its health ", at lessons on theme " Blood system ". It is used both at an explanation of a new material, and for examination of pupils in the oral or written form. Studied structure features are adapted for a level of the knowledge needed in the program of a comprehensive school. Separate elements are provided with numbers for check and control of knowledge. The model is supplied by the operation manual with methodical recommendations on use. The size 15х10х8 cm The model assembly The model consists of removable parts, represents an internal structure of human heart. Following details of heart structure are painted in colors: Pulmonary trunk Left auricle front interventricular artery Greater vein of heart Left ventricle Right ventricle right coronal artery Right auricle Arch of aorta top hollow vein