Paranasal air sinuses
Paranasal sinus anatomy
Mucoceles of the Paranasal Sinuses
3D Sinus Animation
Paranasal Sinuses
Paranasal Sinuses
Sinusitis Pathology (Para-nasal Sinus Anatomy)
Paranasal Sinuses
59. Nasal cavity and paranasal sinuses
Sinus Inflammation caused by teeth
The anatomy of Nose,The Paransal Sinuses.mp4
Dr Sherif Galal Neck 15 "Nose , Nasal cavity & Paranasal sinus "
Lateral Paranasal Sinuses
Fistula of paranasal sinus in a cow
Paranasal air sinuses
Paranasal sinus anatomy
Mucoceles of the Paranasal Sinuses
3D Sinus Animation
Paranasal Sinuses
Paranasal Sinuses
Sinusitis Pathology (Para-nasal Sinus Anatomy)
Paranasal Sinuses
59. Nasal cavity and paranasal sinuses
Sinus Inflammation caused by teeth
The anatomy of Nose,The Paransal Sinuses.mp4
Dr Sherif Galal Neck 15 "Nose , Nasal cavity & Paranasal sinus "
Lateral Paranasal Sinuses
Fistula of paranasal sinus in a cow
Paranasal Sinus Model
Anatomy of the Nose
Hyperturbinal fenstation of paranasal sinus left
Human skull with brain endocast, paranasal sinuses, & mastoid sinuses
computer tomography of paranasal sinus
Sinusitis Pathology Para nasal Sinus Anatomy
Hypoturbinal fenstation of paranasal sinus left
Human skull with brain endocast, paranasal sinuses, tympanic sinus
Pronounce Medical Words ― Paranasal Sinus And Nasal Cavity Cancer
Paranasal sinuses are a group of four paired air-filled spaces that surround the nasal cavity (maxillary sinuses), above the eyes (frontal sinuses), between the eyes (ethmoid sinuses), and behind the ethmoids (sphenoid sinuses). The sinuses are named for the facial bones in which they are located.
Humans possess a number of paranasal sinuses, divided into subgroups that are named according to the bones within which the sinuses lie:
The paranasal air sinuses are lined with respiratory epithelium (ciliated pseudostratified columnar epithelium).
Paranasal sinuses form developmentally through excavation of bone by air-filled sacs (pneumatic diverticula) from the nasal cavity. This process begins prenatally, and it continues through the course of an organism's lifetime.
Paranasal sinuses occur in a variety of animals (including most mammals, birds, non-avian dinosaurs, and crocodilians). In non-humans, the bones occupied by sinuses are quite variable.
The biological role of the sinuses is debated, but a number of possible functions have been proposed: