Which two bones form the flat bony partition between the side of the nasal cavity?

The two bones that form the flat bony partition between the sides of the nasal cavity are the ethmoid and the vomer. The ethmoid bone is a sieve-like structure located at the roof of the nasal cavity and contributes to its lateral walls, while the vomer is shaped like a plow and forms the inferior portion of the nasal septum, separating the left and right nasal passages. Together, these bones are essential in supporting the structure of the nasal cavity and facilitating airflow and olfactory function.

The other options do not correctly describe the bones forming the nasal septum. The maxilla and palatine primarily contribute to the structure of the hard palate and do not directly form the nasal septum. The lacrimal and zygomatic bones are associated with the orbit and facial structure rather than the nasal cavity. Lastly, the sphenoid bone is located more posteriorly and has no direct involvement in forming the partition between the nasal cavity's sides. Therefore, the combination of the ethmoid and vomer is essential for separating and contributing to the anatomy of the nasal cavity.