The oral cavity, also known as the mouth, is a hollow space within the head that contains the lips, teeth, gums, tongue, and other structures. It serves as the entrance to the digestive system and allows for the consumption of food and the production of speech through the movement of air over the vocal cords. The oral cavity also plays an important role in maintaining overall health by allowing for regular brushing and flossing which helps prevent tooth decay, gum disease, and other dental problems.