In humans there are 12 pair of ribs .The 8th 9th and 10th pair of ribs are called false ribs as the are connected to the 7th rib by a cartilage. And 11th and 12ths pair of ribs are called floating ribs.
White coated tongue is a common sign of fungal infection known as Oral Thrush. As it is mostly caused by overgrowth of fungus called Candida, this condition is also referred to as Candidiasis of the mouth and throat.
As such, you cannot actually remove the bacteria from your tongue just by scraping it. The ideal tongue coating consists of a thin, white film on the surface of the tongue. A thin, white coating indicates that the stomach and digestive system is healthy and functioning in the process of transforming and digesting food.