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Which of the following are included as believed functions of the sinuses? 1. Decrease the weight of the skull.2. Warm and moisten inhaled air.3. Provide a resonating chamber for voice.

The frontal sinuses are usually __________ and __________ in size.

The horizontal central ray forms an angle of how many degrees with the OML for the PA axial (Caldwell) projection, vertical grid technique, of the sinuses?

Letter A in the diagram below of the orbit labels the: orbit(3).jpg

The central ray exit point for the PA of the mandible is ___________.

Which two facial bones form the roof of the mouth? (Select the two that apply.)

Which of the following is(are) true regarding positioning for the Waters method for the facial bones?1. The orbitomeatal line forms a 37-degree angle with the plane of the IR.2. The infraorbitomeatal line forms a 37-degree angle with the plane of the IR.3. The midsagittal plane is perpendicular to the IR plane.

For the parietoacanthial projection, Waters method of the facial bones, the orbitomeatal line will form a _________ degree angle with the IR.

The posterior ethmoid air cells drain into the _________ nasal meatus.

The red oxygenated and non-oxygenated blood of the arteries and veins that influences the color of the skin by way of its presence in the superficial capillaries is known as