The reporting of profitability involves two things: the amount that was earned (revenues) and the expenses necessary to earn the revenues. As you will see next, the term revenues is not the same as receipts, and the term expenses involves more than just writing a check to pay a bill.
Smoking or chewing tobacco & poor oral hygiene may contribute to the formation of a black hairy tongue. Hair does not actually grow on your tongue but gives that appearance to some degree as the filiform papillae of your tongue elongate . The use of a tongue blade daily may prevent, eliminate or control this issue. Chewing tobacco can also cause cancer which is more serious! In brief: May contribute to.
Physical Cause. The tongue is primarily composed of muscles. It is covered with a mucous membrane. The upper surface of the tongue has small bumps called papillae. Taste buds reside between the small bumps. When the papillae grow longer and do not properly shed, a black appearance develops, which is called black tongue.