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.
Some other causes of coated white tongue are accumulation of keratin or dead skin cells on the surface of tongue, tobacco abuse, consumption of extremely hot foods or beverages etc. Abnormal buildup of keratin is generally caused by dehydration as it tends to dry out saliva, thereby making the tongue dry.