How many systems are included in Complete Heart?

Complete Heart includes two organs: a full model of the heart, including three layers and a beating animation; and the lungs, which include two layers for easy navigation.

Four systems are also included: the thoracic cage in the skeletal system; the cardiac conduction system and related nerves in the nervous system; and the arterial and venous systems across the full body.

A mini anatomy model of blood vessels is also featured.