PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY
Head. Model of a human head showing the muscles (red) of the face and neck. The facial muscles are used to form expressions, as well as during eating and talking. The large neck muscles support the head, as well as controlling its movement. Also seen in the neck is a carotid artery (red) and a jugular vein (blue). One of the parotid glands (yellow), the largest of the salivary glands, is at lower centre.
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