Frontal sinus

frontalfrontal air sinusesfrontal sinusesfrontal air sinus
The frontal sinuses are one of the four pairs of paranasal sinuses that are situated behind the brow ridges.wikipedia
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Paranasal sinuses

sinusessinusparanasal sinus
The frontal sinuses are one of the four pairs of paranasal sinuses that are situated behind the brow ridges.
The maxillary sinuses are located under the eyes; the frontal sinuses are above the eyes; the ethmoidal sinuses are between the eyes and the sphenoidal sinuses are behind the eyes.

Brow ridge

supraorbital ridgebrow ridgessuperciliary arches
The frontal sinuses are one of the four pairs of paranasal sinuses that are situated behind the brow ridges.
Behind the ridges, deeper in the bone, are the frontal sinuses.

Frontonasal duct

Each opens into the anterior part of the corresponding middle nasal meatus of the nose through the frontonasal duct which traverses the anterior part of the labyrinth of the ethmoid.
The frontonasal duct is a communication between the frontal air sinuses and their corresponding nasal cavity.

Sinus (anatomy)

sinussinusesinfundibulum
Sinuses are mucosa-lined airspaces within the bones of the face and skull.
Frontal

Semilunar hiatus

hiatus semilunaris
These structures then open into the semilunar hiatus in the middle meatus.
It is the location of the openings for the frontal sinus, maxillary sinus, and anterior ethmoidal sinus.

Supraorbital nerve

supraorbitalsuperior orbital nervesupra-orbital
The mucous membrane in this sinus is innervated by the supraorbital nerve, which carries the postganglionic parasympathetic nerve fibers for mucous secretion from the ophthalmic nerve and supplied by the supraorbital artery and anterior ethmoidal artery.
Additionally it supplies the conjunctiva of the eye, the frontal sinus and the skin from the forehead extending back to the middle of the scalp.

Anterior ethmoidal artery

anterioranterior ethmoid arteryAnterior ethmoidal
The mucous membrane in this sinus is innervated by the supraorbital nerve, which carries the postganglionic parasympathetic nerve fibers for mucous secretion from the ophthalmic nerve and supplied by the supraorbital artery and anterior ethmoidal artery.
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.

Frontal bone

frontalfrontalsfrontal bones
The frontal bone is membranous at birth and there is rarely more than a recess until the bone tissue starts to ossify about age two.
It is generally maintained that the development of the frontal sinuses begins at the end of the first or beginning of the second year, but may begin at birth.

Supraorbital artery

supraorbitalsupra-orbitalartery
The mucous membrane in this sinus is innervated by the supraorbital nerve, which carries the postganglionic parasympathetic nerve fibers for mucous secretion from the ophthalmic nerve and supplied by the supraorbital artery and anterior ethmoidal artery.
This artery supplies the levator palpebrae superioris, the diploë of the frontal bone, the frontal sinus, the upper eyelid, and the skin of the forehead and the scalp.

Mucous membrane

mucosamucous membranesmucosal
Sinuses are mucosa-lined airspaces within the bones of the face and skull.

Ethmoid bone

ethmoidsupraethmoidinfundibulum
Each opens into the anterior part of the corresponding middle nasal meatus of the nose through the frontonasal duct which traverses the anterior part of the labyrinth of the ethmoid.

Nasal meatus

middle meatussuperior meatusinferior meatus
Each opens into the anterior part of the corresponding middle nasal meatus of the nose through the frontonasal duct which traverses the anterior part of the labyrinth of the ethmoid. These structures then open into the semilunar hiatus in the middle meatus.

Septum

septaseptateseptal
Frontal sinuses are rarely symmetrical and the septum between them frequently deviates to one or other side of the middle line.

Postganglionic nerve fibers

postganglionicpostganglionic fiberspostganglionic neuron
The mucous membrane in this sinus is innervated by the supraorbital nerve, which carries the postganglionic parasympathetic nerve fibers for mucous secretion from the ophthalmic nerve and supplied by the supraorbital artery and anterior ethmoidal artery.

Parasympathetic nervous system

parasympatheticparasympathetic nerveparasympathetic nerves
The mucous membrane in this sinus is innervated by the supraorbital nerve, which carries the postganglionic parasympathetic nerve fibers for mucous secretion from the ophthalmic nerve and supplied by the supraorbital artery and anterior ethmoidal artery.

Mucus

mucousnasal mucussnot
The mucous membrane in this sinus is innervated by the supraorbital nerve, which carries the postganglionic parasympathetic nerve fibers for mucous secretion from the ophthalmic nerve and supplied by the supraorbital artery and anterior ethmoidal artery.

Secretion

secretedsecretesecretory pathway
The mucous membrane in this sinus is innervated by the supraorbital nerve, which carries the postganglionic parasympathetic nerve fibers for mucous secretion from the ophthalmic nerve and supplied by the supraorbital artery and anterior ethmoidal artery.

Puberty

pubescentpubescencesexual development
The frontal sinuses are absent at birth, but are generally fairly well developed between the seventh and eighth years, only reaching their full size after puberty.

Maxillary sinus

maxillarymaxillary sinus neoplasmsmaxillary sinuses
Sinus development begins in the womb, the maxillary and ethmoid sinuses are present at birth.

Ethmoid sinus

ethmoidalethmoidal cellsethmoidal sinus
Sinus development begins in the womb, the maxillary and ethmoid sinuses are present at birth.

Sphenoidal sinus

sphenoid sinussphenoidalsphenoidal sinuses
Sphenoidal sinuses are present at birth as well but are very small.

Cilium

ciliaciliatedciliary
Nasal and sinal mucosae are ciliated and move mucus to the choanae and finally to the stomach.

Choana

choanaeinternal naresposterior nasal apertures
Nasal and sinal mucosae are ciliated and move mucus to the choanae and finally to the stomach.

White blood cell

leukocyteleukocyteswhite blood cells
The thick upper layers of nasal mucus trap bacteria and small particles in tissue abundantly provided with immune cells, antibodies, and antibacterial proteins.

Antibody

antibodiesimmunoglobulinimmunoglobulins
The thick upper layers of nasal mucus trap bacteria and small particles in tissue abundantly provided with immune cells, antibodies, and antibacterial proteins.