Sense of Smell

• Our nose is the sensory organ that enables us to smell.

Structure of Nose

• The sensory cells which respond to the stimulus of smell are located in the roof of the nasal cavity.
• These receptors are covered with the mucus, which dissolves airborne chemicals.
• When chemicals dissolve in the mucus, the sensory cells will send a message (nerve impulses) to the brain for identifying the kind of smell detected. 

Reason of Running Nose