What is the ethmoid plate?
The perpendicular plate of the ethmoid bone (vertical plate) is a thin, flattened lamina, polygonal in form, which descends from the under surface of the cribriform plate, and assists in forming the septum of the nose; it is generally deflected a little to one or other side.
What is an ethmoid bone?
The ethmoid bone is an unpaired cranial bone that is a significant component of the upper nasal cavity and the nasal septum. The ethmoid bone also constitutes the medial orbit wall.
What is the orbital plate of ethmoid bone?
The orbital lamina of ethmoid bone, (or lamina papyracea or orbital lamina) is a smooth, oblong bone plate which forms the lateral surface of the labyrinth of the ethmoid bone in the skull. The plate covers in the middle and posterior ethmoidal cells and forms a large part of the medial wall of the orbit.
What is the cribriform plate?
The cribriform plate is a transverse plate, pierced by many small cribriform foramina, that forms the anteroventral wall of the cranial cavity. From: The Dissection of Vertebrates (Second Edition), 2011.
What is the function of the ethmoid bone?
The ethmoid bone is a cube-shaped bone located in the center of the skull between the eyes. It helps form the walls of the eye socket, or orbital cavity, as well as the roof, sides, and interior of the nasal cavity.
What does the ethmoid bone contain?
Ethmoid bone
| Ethmoidal labyrinths | Contain ethmoidal cells (little cavities) which form the ethmoidal sinus. The labyrinths form the superior and middle nasal conchae. The ethmoidal bulla is connected to the maxillary sinus via the hiatus semilunaris. |
|---|---|
| Perpendicular plate | It forms part of the nasal septum. |
Is the ethmoid bone part of the axial skeleton?
The ethmoid bone forms the inferior portion of the nasal septum. The ethmoid bone is part of the axial skeleton.
What is the function of the cribriform plate of the ethmoid bone?
function in sinus system This bone, the cribriform plate, transmits the olfactory nerves that carry the sense of smell.
Where is the ethmoid bone located?
The ethmoid bone (/ˈɛθmɔɪd/; from Greek ethmos, “sieve”) is an unpaired bone in the skull that separates the nasal cavity from the brain. It is located at the roof of the nose, between the two orbits. The cubical bone is lightweight due to a spongy construction.
Which are parts of the ethmoid bone?
The ethmoid bone consists of four parts: the horizontal Cribriform plate (lamina cribrosa), part of the cranial base. the vertical Perpendicular plate (lamina perpendicularis), which is part of the nasal septum. the two lateral masses or labyrinths.
What is the ethmoid artery?
The anterior ethmoidal artery, also anterior ethmoid artery is an artery of the head. Contents. Course. Once it branches from the ophthalmic artery, it accompanies the nasociliary nerve through the anterior ethmoidal canal to supply the anterior and middle ethmoidal cells, frontal sinus, and anterosuperior aspect of the lateral nasal wall.
Ethmoid Bone. The ethmoid bone is located in front of the sphenoid bone. It consists of two masses, one on each side of the nasal cavity, which is joined horizontally by thin cribriform plates. These plates form part of the roof of the nasal cavity, and nerves (ethmoidal cells) associated with the sense of smell pass through tiny openings in them.