Oblique 3/4 view of skull and teeth with mouth open.

Lateral view of skull and teeth with mouth open.

Lateral close-up view of normal open temporomandibular joint (TMJ).

Anteroposterior radiograph of the atlantoaxial joint, showing the body of the axis (2), the dens (D), and the atlas (A); image is taken through the open mouth.

Anterior view of skull with open mouth.

Anterolateral view of skull with open mouth.

Open mouth with tongue extended indicating areas that distinguish taste (above). Four outlines of tongue with the areas for bitter, sour, sweet, and salty indicated (below).

Illustration of boy demonstrating proper use of metered dose inhaler with open-mouth technique; inhaler is held 1 to 2 inches from mouth.

(Step 1) Hold airway open so that its curvature follows that of the floor of the nose.

Two part procedure for inserting a nasopharyngeal airway. (Top) Hold airway open so that its curvature follows that of the floor of the nose. (bottom) Slide the airway into the nostril until its flange is flush against the opening of the nostril; at that

Sagittal view of adolescent's head and neck showing direct laryngoscopy using a curved blade; blade in this case is too long, displacing epiglottis posteriorly over glottic opening.

Hemostats maintain the horizontal opening in the cricothyroid membrane while tracheal tube is passed through the incision and into the trachea; sternohyoid m. is retracted; position of thyroid gland is indicated.

Mouth, open