ANATOMY

Detailed explanation-1: -Nasopharynx: The top part of the throat connects to the nasal cavities (nose) and lets air pass through. Oropharynx : The middle part of the throat connects to the oral cavity (mouth). It allows air, food and fluid to pass through.

Detailed explanation-2: -The common passage for food and air is pharynx. Pharynx is the musculomembranous cavity behind the nose and mouth, connecting them to the oesophagus and larynx.

Detailed explanation-3: -Air enters the nasal cavity from the outside through two openings: the nostrils or external nares. The openings from the nasal cavity into the pharynx are the internal nares.

Detailed explanation-4: -Complete answer: The common passage for food and air is the oropharynx.

Detailed explanation-5: -The nasopharynx connects the nasal cavity to the oropharynx and contains the Eustachian tube openings and adenoids.