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Posterior means behind or toward the back -- so which bone is behind the ethmoid bone? The sphenoid bone (butterfly shaped one).
The bone that is found just posterior to the ethmoid bone in the orbit is the sphenoid. Major paranasal sinuses are the ethmoid, sphenoid, frontal, and maxillary sinuses.
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What are the seven bones that form the orbit of the eye?
The seven bones that form the orbit of the eye are the frontal bone, zygomatic bone, maxilla bone, sphenoid bone, ethmoid bone, lacrimal bone, and palatine bone. These bones create a protective cavity that houses and supports the eye.
Where are the ethmoid sinuses?
The sinuses are paired air pockets located within the bones of the face. They are: the ethmoid sinuses; located between the eyes, just behind the bridge of the nose.
Name the bones that compose the orbit of the eye?
The bones that form the orbit of the eye are the ethmoid, lacrimal, maxilla, frontal, sphenoid, zygoma, palatine The orbits are pyramidal, bony cavities in the facial skeleton with their bases (orbital openings) directed anterolaterally and their apices, posteromedially. The orbits contain and protect the eyeballs and their muscles, nerves, and vessels, together with most of the lacrimal apparatus. All space in the orbits not occupied by structures is filled with orbital fat. The fat forms a matrix in which the structures of the orbit are embedded. The orbit has a base, four walls, and an apex: The superior wall (roof) is approximately horizontal and is formed mainly by the orbital part of the frontal bone, which separates the orbital cavity from the anterior cranial fossa. Near the apex of the orbit, the superior wall is formed by the lesser wing of the sphenoid. Anterolaterally the lacrimal gland occupies the fossa for the lacrimal gland (lacrimal fossa) in the orbital part of the frontal bone. The medial wall is formed by the ethmoid bone, along with contributions from the frontal, lacrimal, and sphenoid bones. Anteriorly, the medial wall is indented by the lacrimal groove and fossa for the lacrimal sac. The bone forming the medial wall is paper thin, and the ethmoid air cells are often visible through the bone of a dried cranium. The lateral wall is formed by the frontal process of the zygomatic bone and the greater wing of the sphenoid. This is the strongest and thickest wall, which is important because it is most exposed and vulnerable to direct trauma. Its posterior part separates the orbit from the temporal lobes of the brain and middle cranial fossae. The inferior wall (floor) is formed mainly by the maxilla and partly by the zygomatic and palatine bones. The thin inferior wall is shared by the orbit superiorly and the maxillary sinus inferiorly. It slants inferiorly from the apex to the inferior orbital margin. The inferior wall is demarcated from the lateral wall by the inferior orbital fissure. The apex of the orbit is at the optic canal in the lesser wing of the sphenoid, just medial to the superior orbital fissure. The bones forming the orbit are lined with periorbita (periosteum of the orbit). The periorbita is continuous at the optic canal and superior orbital fissure with the periosteal layer of dura mater. The periorbita is also continuous over the orbital margins and through the inferior orbital fissure with the periosteum covering the external surface of the cranium (pericranium) and with the orbital septa at the orbital margins, with the fascial sheaths of the extraocular muscles, and with orbital fascia that forms the fascial sheath of the eyeball.
Where is the posterior pituitary gland located?
The posterior pituitary is located in a portion of the sphenoid bone called the sella turcica. It is attached to the anterior pituitary gland by the pars intermedia which is a thin layer of endocrine tissue. The posterior pituitary is actually just an extension of the neural tissue that composes the hypothalamus.
What is the prominent bulge just posterior and inferior to the external auditory meatus?
The prominent bulge just posterior and inferior to the external auditory meatus is the mastoid process of the temporal bone. This bony prominence serves as an attachment site for several muscles involved in head movement and provides protection to the structures within the mastoid air cells.
What bone is found just posterior to the ethmoid in the orbit?
the sphenoid bone
What bone is found just posterior to the ethmoid bone of the orbit?
the sphenoid bone
What are the seven bones that form the orbit of the eye?
The seven bones that form the orbit of the eye are the frontal bone, zygomatic bone, maxilla bone, sphenoid bone, ethmoid bone, lacrimal bone, and palatine bone. These bones create a protective cavity that houses and supports the eye.
Where are the ethmoid sinuses?
The sinuses are paired air pockets located within the bones of the face. They are: the ethmoid sinuses; located between the eyes, just behind the bridge of the nose.
What is the name of the cartilage projecting just posterior to the hyoid bone?
triticeal cartilage
Name the bones that compose the orbit of the eye?
The bones that form the orbit of the eye are the ethmoid, lacrimal, maxilla, frontal, sphenoid, zygoma, palatine The orbits are pyramidal, bony cavities in the facial skeleton with their bases (orbital openings) directed anterolaterally and their apices, posteromedially. The orbits contain and protect the eyeballs and their muscles, nerves, and vessels, together with most of the lacrimal apparatus. All space in the orbits not occupied by structures is filled with orbital fat. The fat forms a matrix in which the structures of the orbit are embedded. The orbit has a base, four walls, and an apex: The superior wall (roof) is approximately horizontal and is formed mainly by the orbital part of the frontal bone, which separates the orbital cavity from the anterior cranial fossa. Near the apex of the orbit, the superior wall is formed by the lesser wing of the sphenoid. Anterolaterally the lacrimal gland occupies the fossa for the lacrimal gland (lacrimal fossa) in the orbital part of the frontal bone. The medial wall is formed by the ethmoid bone, along with contributions from the frontal, lacrimal, and sphenoid bones. Anteriorly, the medial wall is indented by the lacrimal groove and fossa for the lacrimal sac. The bone forming the medial wall is paper thin, and the ethmoid air cells are often visible through the bone of a dried cranium. The lateral wall is formed by the frontal process of the zygomatic bone and the greater wing of the sphenoid. This is the strongest and thickest wall, which is important because it is most exposed and vulnerable to direct trauma. Its posterior part separates the orbit from the temporal lobes of the brain and middle cranial fossae. The inferior wall (floor) is formed mainly by the maxilla and partly by the zygomatic and palatine bones. The thin inferior wall is shared by the orbit superiorly and the maxillary sinus inferiorly. It slants inferiorly from the apex to the inferior orbital margin. The inferior wall is demarcated from the lateral wall by the inferior orbital fissure. The apex of the orbit is at the optic canal in the lesser wing of the sphenoid, just medial to the superior orbital fissure. The bones forming the orbit are lined with periorbita (periosteum of the orbit). The periorbita is continuous at the optic canal and superior orbital fissure with the periosteal layer of dura mater. The periorbita is also continuous over the orbital margins and through the inferior orbital fissure with the periosteum covering the external surface of the cranium (pericranium) and with the orbital septa at the orbital margins, with the fascial sheaths of the extraocular muscles, and with orbital fascia that forms the fascial sheath of the eyeball.
Where is the posterior pituitary gland located?
The posterior pituitary is located in a portion of the sphenoid bone called the sella turcica. It is attached to the anterior pituitary gland by the pars intermedia which is a thin layer of endocrine tissue. The posterior pituitary is actually just an extension of the neural tissue that composes the hypothalamus.
Name the notch found just inferior to the posterior inferior iliac spine?
The greater ischiadic (sciatic) notch
Red bone marrow is found in spongy or compact bone?
Bone marrow is the substance that is found at the core of bones, and is either made of fat or red blood cells depending on the type of bone in question. For spongy bone, the marrow is made of red blood cells.
What is the site ofthe mastoid process in cranium?
The mastoid process is a bony protuberance on the temporal bone, just posterior and inferior to the external auditory meatus. It can be felt under the skin just behind and below the ear.
Where is the location of the Crista gali?
The crista galli is a vertical, blade-like projection located in the anterior part of the ethmoid bone, which is situated at the base of the skull between the two orbits. It serves as an attachment point for the falx cerebri, a membrane that separates the two cerebral hemispheres. The crista galli is found in the midline of the skull, just above the nasal cavity.
What is the prominent bulge just posterior and inferior to the external auditory meatus?
The prominent bulge just posterior and inferior to the external auditory meatus is the mastoid process of the temporal bone. This bony prominence serves as an attachment site for several muscles involved in head movement and provides protection to the structures within the mastoid air cells.
