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1.3 SENSE OF SMELL

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 .

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1.3 SENSE OF SMELL

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  1. 1.3 SENSE OF SMELL Sense of smell detects the presence of chemical substancesin the air. Its sensory organ is the nose.

  2. Structure of Human NOSE Sinus Nasal cavity Nostril Sinus Opening of auditory nerve Hard palate Nasopharynx Oral cavity Uvula Tongue Tonsil Pharynx Epiglottis Glottis Vocal cords Larynx Esophagus Trachea

  3. Structure of Human NOSE In the nasal cavity, there are :- a. Sensory cellsto detect smell b. Glandular cells which secrete mucus Smell receptors : Olfactory bulb Hard palate Olfactory Nerve Fibres

  4. Detection of Smell Certain smells are more easily detected than others. Do you know why?

  5. Detection of Smell 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?

  6. Detection of Smell Why do we sneeze?What happen when we are having flu? What’s the effect of it?

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