There is also a deep depression in the superior surface of the bone called the sella turcica, or "Turkish saddle." It is so named because of its resemblance to the saddles Turks used to use, with supports in the front and back. It is in this depression that the pituitary gland sits. ...
The medial border connects with the following structures (superior to inferior): the nasal spine of the frontal bone, the perpendicular plate of the ethmoid bone, and the nasal septal cartilage. The main function of the nasal bone is to form the external surface of the nose, nasal aperture,...
CSF drains into blood through arachnoid villi and through channels in the cribriform plate of the ethmoid bone into nasal lymphatics, permitting cells to travel from CSF to cervical lymph nodes. Efferent pathways by which lymphocytes enter the brain are regulated by integrins on lymphocytes and ...
What are the 8 cranial bones? The eight cranial bones are the bones surrounding the brain. They include the frontal bone, parietal bones (2), temporal bones (2), occipital bone, sphenoid bone, and ethmoid bone.What are the Cranial Bones? Cranial bones are often known as the skull. They...
The sense of smell, the second function, is served by an olfactory membrane lining the roof of theethmoid sinuses. Protruding among supporting cells are tiny buttons, each with three to four fine hairs lying in a special secretion. Turbulence ensures that the scent of roses, for example, or...
The ethmoidal sinuses are variable in both size and the number of small cavities within the ethmoid labyrinth of the ethmoid bone. A collection of air cells (3 to 18) are located between the nose and the orbit. The lamina papyracea, which is a thin, orbital plate of the ethmoid bone,...
When these epithelial protrusions have fused in the center of the otic vesicle, chsy1 transcript levels drop (J). Abbreviations are as follows: ep, epithelial protrusions; et, ethmoid plate (neurocranium); fep, fin epithelium; fp, floor plate; hy, hyoid (second pharyngeal arch); md, ...
Together with the spleen, bone marrow, tonsils, thymus, the lymphatic tissue in the small intestine and white blood cells (leukocytes), the lymph nodes form the human’s immune system, which fights against infections. Locations There are hundreds of lymph nodes in the human body. They appear ...
may be to help direct airflow to the olfactory region in the posterior part of the nasal cavity (Van Valkenburgh et al.2014b). In this olfactory region, blind recesses are formed between complex turbinates covered in olfactory epithelium. These turbinates may be attached to ethmoid, frontal ...
A three-dimensional quantitative investigation of frontal sinus morphology and function in mammalian carnivoresMammal skulls contain up to four mucosal-lined, air-filled cavities called paranasal sinuses within the bones surrounding the nasal chamber, including the maxilla, ethmoid, ...