When suctioning the airway, suction should never be applied for longer than ________ seconds

All of the following are functions of the dermis EXCEPT that it:

A. houses epidermal appendages. B. assists with vitamin D production. C. provides sensation. D. assists with thermoregulation.

Which of the following are aspects of primary prevention?

A) Professional oral assessment B) Patient's plaque control C) Community water fluoridation D) All of the above