Where are the olfactory receptors, and why is that site poorly suited for their job?

Answer 1

Olfacory receptors exist throughout the human nasal cavity but mainly olfactory region. They are direct nerve endings of the 1st cranial nerve, the ofactory nerve on left and right side.. The cranial nerve actually is a cluster of small fibers from frontal lobe running down the seive like ethmoid bone. They are well developed in lower animals like dogs. Humans use less of odor sense .So olfactory sense and nerves are not well developed.

Answer 2

olfactory receptors are nerve endings of olfactory nerve . this is the first cranial nerve ,compared to animals odor sensation is not well developed in humans though humans can differentiate thousands of smell. these nerve endings are situated in ethmoid bone..