ethmoidal cell वाक्य
उदाहरण वाक्य
मोबाइल
- It is the thinnest wall of the orbit, evidenced by pneumatized ethmoidal cells.
- The anterior ethmoidal cells of the ethmoidal sinus open into the front part of the infundibulum as well.
- More rarely it opens on both surfaces, and then communicates with the posterior ethmoidal cells and the sphenoidal sinus.
- In some cases the air cell opens on this surface of the bone and then communicates with the posterior ethmoidal cells.
- In 90 % of patients an anterior ethmoidal cell ( called the " agger nasi cell " ) can be found in the lacrimal bone below the agger nasi ridge.
- The area in front of this furrow forms part of the middle meatus of the nose; that behind it articulates with the ethmoid, and completes some of the anterior ethmoidal cells.
- The bulla ethmoidalis is caused by the bulging of the middle ethmoidal cells which open on or immediately above it, and the size of the bulla varies with that of its contained cells.
- It consists of a thin infundibulum, extends upward and forward through the labyrinth and communicates with the anterior ethmoidal cells, and in about 50 % of skulls is continued upward as the frontonasal duct into the frontal sinus.
- On it is a curved fissure, the hiatus semilunaris, limited below by the edge of the uncinate process of the ethmoid and above by an elevation named the bulla ethmoidalis; the middle ethmoidal cells are contained within this bulla and open on or near to it.
- The lateral margin of the anterior surface is serrated, and articulates with the lamina papyracea of the ethmoid, completing the posterior ethmoidal cells; the lower margin articulates with the orbital process of the palatine bone, and the upper with the orbital plate of the frontal bone.
- It carries sensory branches from the eyes, conjunctiva, lacrimal gland, nasal cavity, frontal sinus, ethmoidal cells, falx cerebri, dura mater in the anterior cranial fossa, superior parts of the tentorium cerebelli, upper eyelid, dorsum of the nose, and anterior part of the scalp.
- Through the hiatus semilunaris the meatus communicates with a curved passage termed the infundibulum, which communicates in front with the anterior ethmoidal cells and in rather more than fifty percent of skulls is continued upward as the frontonasal duct into the frontal air-sinus; when this continuity fails, the frontonasal duct opens directly into the anterior part of the meatus.
- Its " medial surface " forms part of the lateral wall of the nasal cavity; at its upper part is a rough, uneven area, which articulates with the ethmoid, closing in the anterior ethmoidal cells; below this is an oblique ridge, the ethmoidal crest, the posterior end of which articulates with the middle nasal concha, while the anterior part is termed the agger nasi; the crest forms the upper limit of the atrium of the middle meatus.
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