One of the nasal bones.
A bone which forms the top of the nasal cavity and part of the orbits.
Bone forming the anterior base of the cranium, bony nasal septum, and medial walls of the eye sockets.
A bone in the floor of the cranium that contributes to the nasal cavity and orbits. The part of the ethmoid forming the roof of the nasal cavity, the cribriform plate, is pierced with many small holes through which the olfactory nerves pass.
A complex thin-walled bone, roughly cuboidal in shape, located in the middle of the skull above the nasal cavities and below the anterior fossa of the cranial cavity. Its flat upper surface is the cribriform plate, which forms much of the roof of the nasal cavities; its upper surface has a midline bony keel that projects up into the cranial cavity and on both sides of which are perforated valleys through which the olfactory nerves project up from the olfactory epithelium. In the midline under the cribriform plate is a mirror-image (to the crista galli) keel, the perpendicular plate, which projects down between the nasal cavities as part of the bony nasal septum. The right and left sides of the ethmoid bone are the ethmoidal labyrinths, composed of ethmoidal air cells; the inner surfaces of the labyrinths form the middle nasal conchae, while the lateral surfaces form the orbital plates, which are part of the mosaic of bones that form the inner walls of the orbits.
Light spongy bone between the eye sockets; forms part of the nasal cavities.
A type of melanin that is dark brown to black in color. People with dark-colored skin mostly produce eumelanin. There are two types of melanin; the other type is pheomelanin.
The ethmoid bone is a component of the skull’s floor and contributes to the roof of the nasal cavity and the eye sockets (orbits). Within the ethmoid bone, there is a section called the cribriform plate, through which the olfactory nerves, responsible for our sense of smell, pass via small holes.