Stock Photo: DIGESTIVE SYSTEM. Anatomic model of the internal structures of the head and the neck of an adult human body left lateral view of a median section. The mouth is the starting point of the digestive tract. Its opening is controled by the orbicularis oris muscle of the lips
Stock Photo: 824-54858 DIGESTIVE SYSTEM. Anatomic model of the internal structures of the head and the neck of an adult human body left lateral view of a median section. The mouth is the starting point of the digestive tract. Its opening is controled by the orbicularis oris muscle of the lips

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