Hamburger - Recipes for placing meat between slices of bread date back to Roman times. However, that was for steak, not minced meat. Thus, the steak burger is older than the hamburger! Sausage is one of the oldest forms of processed food, having been mentioned in Homer's Odyssey in the 9th century BC. The tongue is a muscle with glands, sensory cells, and fatty tissue that helps to moisten food with saliva. You cannot taste food unless it is mixed with saliva. For instance, if salt is placed on a dry tongue, the taste buds will not be able to identify it. As soon as saliva is added, the salt dissolves and the taste sensation takes place. There are 4 basic tastes. The salt and sweet taste buds are at the tip of the tongue, bitter at the base, and sour along the sides.