Frontonasal duct
Encyclopedia
The frontal air sinuses are lined by mucous membrane
, and each communicates with the corresponding nasal cavity
by means of a passage called the frontonasal duct.
This infundibulum
located within the ethmoid bone
connects the nasal cavity with the frontal air sinuses.
Mucous membrane
The mucous membranes are linings of mostly endodermal origin, covered in epithelium, which are involved in absorption and secretion. They line cavities that are exposed to the external environment and internal organs...
, and each communicates with the corresponding nasal cavity
Nasal cavity
The nasal cavity is a large air filled space above and behind the nose in the middle of the face.- Function :The nasal cavity conditions the air to be received by the other areas of the respiratory tract...
by means of a passage called the frontonasal duct.
This infundibulum
Ethmoidal infundibulum
The hiatus semilunaris is bounded inferiorly by the sharp concave margin of the uncinate process of the ethmoid bone, and leads into a curved channel, the infundibulum, bounded above by the bulla ethmoidalis and below by the lateral surface of the uncinate process of the ethmoid....
located within the ethmoid bone
Ethmoid bone
The ethmoid bone is a bone in the skull that separates the nasal cavity from the brain. As such, it is located at the roof of the nose, between the two orbits. The cubical bone is lightweight due to a spongy construction. The ethmoid bone is one of the bones that makes up the orbit of the eye...
connects the nasal cavity with the frontal air sinuses.