How Many Systems? There are 15 organ systems and 78 organs in the human body. Most we know of and factor into our sense of health and well-being others we don't associate as being a system at all. For the case of using this blog to drive home the point of moving From Panic to Empowerment, the one system that stands out in this way of being discounted is the Sensory System. Sensory system governs our sense of sight, taste, smell, feeling, hearing and balance. Yes, this is a sy