For decades, doctors were taught in medical school that there were 11 major systems in the human body.
They are the circulatory, nervous, respiratory, urinary, reproductive, skeletal, muscular, endocrine, lymphatic, digestive, and integumentary (skin) systems.
All of these bodily systems have been known for a century or more.
But in 1988, scientists at St. Louis University School of Medicine announced the discovery of a 12th human body system.… Read More