Each part has its own set of functions. Cribriform plate of ethmoid. These are the cribriform plate, two ethmoid labyrinths, and a perpendicular plate. Is the ethmoid bone part of the axial skeleton? Through the perforations of the plate run many divisions of the olfactory, or first cranial, nerve, coming from the mucous membrane of the nose. There are four main ethmoid bone parts. The ethmoid bone is a single midline facial bone that separates the nasal cavity from the brain and is located at the roof of the nose and between the orbits.It is a cubical shape and is relatively lightweight because of its spongy construction. The ethmoid bone is an unpaired bone shaped like a cube that articulates with 13 cranial and facial bones. The ethmoid air cells are numerous thin-walled cavities situated in the ethmoidal labyrinth and completed by the frontal, maxilla, lacrimal, sphenoidal, and palatine bones. cribriform plate, perpendicular plate, ethmoidal labyrinth (2). These nerves run through the tiny perforations situated in Cribriform Plate and provide with a sense of smell to humans. The cranial bones it articulates with, include the frontal and sphenoid bones. Gross anatomy. Sometimes called the ethmoidal bone, this important structure is pneumatized, which is to say it is a … Facial bones Ethmoid Bone Anatomy. The ethmoid bone has four parts:. The Skeletal System: The skeletal system mainly functions in providing structural support to the other systems of the body. It forms the roof of the nasal cavity and part of the anterior cranial fossa of the internal cranial base. Anatomical features are labeled and highlighted in this interactive tutorial. The ethmoid bone consists of four parts: Parts. They lie between the upper parts of the nasal cavities and the orbits , and are separated from these cavities by thin bony lamellae. These are the cribriform plate, two ethmoid labyrinths, and a perpendicular plate. Other articles where Ethmoid bone is discussed: human skeleton: Interior of the cranium: …small holes) plate of the ethmoid bone, a midline bone important as a part both of the cranium and of the nose. Both Grant (1944) and Moffat (1987) have provided useful descriptions of the human ethmoid bone. This plate which is situated between the anterior cranial fossa and the nasal cavity is a part of the ethmoid bone that supports the olfactory nerves. The cribriform plate of the ethmoid is a part of the ethmoid bone situated in the horizontal plane, covering the ethmoidal incisure. The human ethmoid bone comprises two very delicate, hollow, blocks of bone; the lateral surfaces of the blocks contribute to the medial walls of the orbits. In human anatomy, the ethmoid bone is one of the bones that make up the skull.It is situated between the nasal cavity and the brain cavity, and makes up the nasal cavity roof, part of the nasal cavity walls, part of the bony orbits around the eyes, and part of the floor of the cranium. The Cribriform Plate forms the roof of the nasal cavity. Ethmoid bone anatomy is quite complicated. It contributes to the anterior cranial fossa.. The ethmoid bone is a cuboid-shaped cranial bone located at the top of the nasal cavity and is shown in various anatomical views. There are four main ethmoid bone parts. It is one of eight cranial bones, two of these – the parietal and temporal bones – are paired; the others – the frontal, occipital, sphenoid, and ethmoid bones – are unpaired. It is one of eight cranial bones, two of these – the parietal and temporal bones – are paired; the others – the frontal, occipital, sphenoid, and ethmoid bones – are unpaired.. 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