The head is a fairly important part of the body for most people and is of a certain interest to medicine and medical research. It is where grey matter and cerebral fluid is contained (known as the brain stuff or mind jelly), it also holds many of the sensory organs which help you to be aware of the environment around you including the eyes which without one would not be able to ogle the hot receptionist at your office. The nose is also a helpful sensory organ in the head which aids respiration as well as certain inhalations as well. The digestive system begins in the head via the mouth. Teeth and the tongue are also essential for communication as well as evening long screaming matches.