We've covered how to repurpose your old router as a range-boosting repeater or a wireless bridge, but if you just need a few extra wired ports for devices your current router can't accommodate, consider repurposing your old router as a network switch.
The human tongue is divided into two parts the anterior and the posterior. The anterior part of the tongue is the visible part at the front and is about two-thirds of the tongue's length. The posterior tongue area is closest to the throat, and roughly one-third of length. There are eight muscles in the human tongue. They can be classified as intrinsic or extrinsic.
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.