1.3 SENSE OF SMELL. Sense of smell detects the presence of chemical substances in the air. Its sensory organ is the nose . Structure of Human NOSE. Sinus. Nasal cavity. Nostril. Sinus. Opening of auditory nerve. Hard palate. Nasopharynx. Oral cavity. Uvula. Tongue. Tonsil .
Opening of auditory nerve
In the nasal cavity, there are :-
a. Sensory cellsto
Smell receptors : Olfactory bulb
Olfactory Nerve Fibres
Certain smells are more easily detected than others. For instance smell of durian is more easily detected than the smell of watermelon.Do you know why?