Mouth

The mouth ( in humans, in animals mouth called ) is the body cavity and the surrounding soft tissues in the head, which forms the upper part of the digestive tract. It is the body cavity is picked up by the food. He is also the human voice production (phonetics ) and for respiration.

Depending on the species and external structure or function of the mouth designations such as mouthparts, mouth or beak be used

Developmental Biology

Animals usually have a digestive system is incorporated into the food through the mouth and excreted through the anus. Which of the two orifices of the body is formed in ontogenesis first determines the classification of animals as Urmünder ( Protostomia, mouth first) or new mouths ( deuterostomes, after first).

Some animals, such as cnidarians or flatworms, have no anus; they excrete the digestive leftovers out through your mouth. Brachiopods do not excrete, digest them without remains. Some parasites, such as tapeworms, in general do not have a mouth. Unless they live in the digestive system of a host, they can absorb the ingredients chyme directly through their skin.

Mouth of man

In humans the oral and its parts making up the front opening of the human digestive tract. In it, the digestion is initiated. The three main parts of the mouth are

• The mouth opening, which is enclosed by the lips
• The atrium, on the one hand is between the lips and cheeks, and on the other hand between the upper and lower jaw along with rows of teeth and
• The oral cavity, with the floor of the mouth, the tongue and the palate.

In addition to its digestive functions, chewing - so crushing and salivation - he is also the voice production and can be used for breathing. The lips press together with the facial muscles of human emotions. The oral cavity passes into the throat area.

Diseases of the mouth

Changes in the oral flora weaken the defensive functions of the oral cavity. Through this weakening occur various diseases.

Among the most common diseases of the mouth to count:

• Aphthae
• Candidiasis
• Mundkatarrh and mouth ulcers
• Cheeks fire

And other diseases of the gums and palate. Halitosis is mostly caused rotting of food particles or by diseases of the esophagus or stomach. In ungulates, especially the foot-and-mouth disease is known as a serious illness.

Synonyms

Colloquially are numerous, often coarse expressions for "mouth" commonly, for example, face, gob, flap, foot, foot work, mouth, edge, slippers, snout, beak, waffle, including m.