<prompt> Openings of the tube of bronchoscope are known asHolesAperturesVentsAny of the above  <response>: Ans. c Vents. Ref. Bronchology by Lukomsky, 40; Diseases of ENT by PL Dhingra, 2nd ed., 484, 528BRONCHOSCOPE Bronchoscope is similar to esophagoscope, but has openings at the distal part of the tube, called vents, which help in aeration of the side bronchi. Size of bronchoscope will vary with age of the patient, with adult size being 9 mm luminal diameter and 40 cm length of tube.Jacksons dictum; In the case of suspected or expected foreign body, it is safer to perform bronchoscopy rather than with holding it. Advantages of flexible fibreo-optic bronchoscopy;- Provides magnification and better illumination.- Permits examination of sub-segmental bronchi.- Easy in patients with neckjaw abnormalities.- Can be performed under topical anaesthesia.- Suctionbiopsy channels are provided which helps to remove secretions, inspissated plugs of mucus or even small foreign bodies.- It can be easily placed through endotracheal tube or tracheostomy opening.- However, it has limited utility in children due to problem of ventilation.- Flexible endoscopes are sterilized by glutaral dehyde or peracetic acid. 