written by: ERWIN VANDENBURG, taken from www.listverse.com The human body is made up of about 37 trillion cells. After all, that is what the textbooks say, right? Wrong! In fact, our bodies contain 30–50 trillion extra cells which belong to the bacteria living in your intestines. However, these bacteria are rather small, weighing a measly 1.4 kilograms (3 lb) altogether, a minor …