Is the inferior nasal concha part of ethmoid bone?

Yes, the inferior nasal concha is part of the ethmoid bone. Specifically, it is one of the three paired concha bones that make up the lateral wall of the nasal cavity. The inferior nasal concha is located below the middle nasal concha and above the floor of the nasal cavity. It is composed of thin, scroll-like bone and covered with mucous membrane.