Explore mouth anatomy with a labeled diagram of the parts of the mouth, lips, tongue, and palate, plus their roles in speech and digestion. mouth, in human anatomy, orifice through which food and air enter the body. The mouth opens to the outside at the lips and empties into the throat at the rear; its boundaries are defined by the lips, cheeks, hard and soft palates, and glottis. Your mouth is responsible for many functions, including eating, breathing and speaking. Taking care of your mouth can keep you in good health. Lips A closed human mouth. The lips come together to close the opening of the mouth, forming a line between the upper and lower lip. In facial expression, this mouth line is iconically shaped like an up-open parabola in a smile, and like a down-open parabola in a frown. The mouth includes several connected parts that help with eating, speaking, tasting, swallowing, and saliva control. The main groups usually include the lips, cheeks, teeth, gums, tongue, palate, salivary glands, and oral lining. For related background details, please refer to our report on hunter ceiling fan wiring instructions. The body cavity immediately behind the mouth opening, known as the oral cavity (or cavum oris in Latin), [2] is also the first part of the alimentary canal, which leads to the pharynx and the gullet. The mouth is a complex structure with various parts, each serving specific functions in the processes of digestion, communication, and respiration. Here are the main parts of the mouth: The mouth is the entrance to both the digestive and the respiratory systems. The inside of the mouth is lined with mucous membranes. When healthy, the lining of the mouth (oral mucosa) ranges in color from reddish pink to gradations of brown or black.

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