The cribriform plate leads to the formation of the top of the nostril. The cribriform plate, perpendicular plate, and ethmoidal labyrinth are the three components of this bone. It contains many nerve fibers that regenerate the ability to smell while passing through the cribriform plates of the ethmoid bone. The olfactory nerve and the ethmoid bone have a close structural connection. It also makes up a large part of the nasal septum and the lateral wall of the nostrils. It makes a significant contribution to the medial wall of the orbit and is a component of the anterior cranial fossa, which divides the nostrils passage from the cranium. It is located within the two orbital cavities as well as on top of the oral cavity. The ethmoid bone is one among the cranium's eight bone structures. The ethmoid injury also leads to anosmia (loss of smell). Fractures of ethmoid bone can cause long-term problems, sometimes years after the incident however, such occurrences are rare. The ethmoid bone is especially vulnerable to fissures because of its porous and brittle nature. It has a protecting role in the body of humans and is crucial for the anatomical development of the skull. The lamina papyracea separates the ethmoid bone from the orbital and encircles the cells of the ethmoid bone. However, by the age of 2 years, it begins to ossify and fuse with the labyrinths and forms a single ethmoid bone. At the time of birth, the ethmoid sinus is well developed. At around 25 to 28 weeks of pregnancy, this bone begins to develop. The labyrinths are very tiny in neonates, and the plates of perpendicular and cribriform are mainly cartilaginous. The ethmoid bone is fully ossified by the ossification named endochondral. It enables the passage of olfactory fibers within it, which makes smelling easy. It is an essential part of the skull because it contains the cribriform plate. The ethmoid bone consists of a cribriform plate, a perpendicular plate, and two ethmoid labyrinths. It has a spongy texture and is relatively light. The orbital, nostril cavities, nasal septum, and the base of the anterior cranial fossa are all shaped by it. The ethmoid bone is a single spongy bone structure that develops in the skull's midfacial region and it is present in the vaso-cranium's middle region.
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