The tongue is anchored to the mouth by webs of tough tissue and mucosa. The tether holding down the front of the tongue is called the frenum. In the back of the mouth, the tongue is anchored into the hyoid bone. The tongue is vital for chewing and swallowing food, as well as for speech. The four common tastes are sweet, sour, bitter, and salty. A fifth taste, called umami, results from tasting glutamate (present in MSG).
There are rules for games, for social clubs, for sports and for adults in the workplace. There are also rules imposed by morality and custom that play an important role in telling us what we should and should not do. However, some rules -- those made by the state or the courts -- are called laws. Laws resemble morality because they are designed to control or alter our behaviour.
A civilization must also have a government to make laws, and lead the people. For a society to survive, the people must follow rules. It is the job of the leaders to decide these rules, and to make sure they are followed. A government s job is to protect its people, and allow a society to grow and develop.orking together is also important in a civilization. People in our society have special jobs in which they produce certain goods or provide services. Different jobs are needed to make a society work, and to meet the needs of a civilization. Some people make clothes or build houses, while others grow or prepare food.