Which part of the human respiratory system is a thin, moist membranous structure where gas exchange occurs?
A. trachea
B. bronchus
C. epiglottis
D. alveolus
Select your answer:
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Radiology Infection Control › ViewIdentify the false statement concerning gloves:
A. Gloves must be worn be all dental professionals
B. Gloves must be washed before use.
C. Gloves must be worn for each patient.
D. Gloves must be sterile for surgical procedures.
Health and Hygiene › View
Which of the following factor is necessary for a healthy person
A. Vaccination
B. Balanced diet
C. Personal hygiene
D. All of above