What structure can be found at the center of the ethmoid bone?

The central structure of the ethmoid bone is the cribiform plate. This anatomical feature is crucial in the context of the skull's structure as it separates the nasal cavity from the cranial cavity. The cribiform plate contains numerous small foramina, which allow the passage of olfactory nerves from the nasal cavity to the olfactory bulb in the brain. This is essential for the sense of smell, making it a key component in the sensory system.

The other structures listed do not belong to the ethmoid bone. The vomer is a separate bone that forms part of the nasal septum, the sella turcica is found in the sphenoid bone and houses the pituitary gland, and the greater wing is also part of the sphenoid bone, contributing to the skull's lateral wall and part of the orbit. Understanding the anatomy and functions of the cribiform plate enhances one's comprehension of both cranial structure and its sensory implications.