Parietal Bone: Definition, Anatomy, and Function
Definition The parietal bone or os parietale is a paired, flat cranial bone that covers the mid portion of the skull. Both bones cover the left …
Paranasal Sinuses: Definition, Anatomy, Function & Disease
Definition The paranasal sinuses are four pairs of hollow cavities in the facial and cranial bones. They are located at the center of the face, surrounding …
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Palatine Bone: Definition, Location, Anatomy, Function
Definition The palatine bone or os palatinum is a paired, flat, irregular facial bone. It forms part of the nasal cavity, oral cavity, and orbit …
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Oblique Muscle: Definition, Location, Group & Strain
Definition Oblique muscle refers to two abdominal muscles – the external and internal obliques. These provide trunk flexion and rotation. The external oblique is the thickest and …
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Medulla Oblongata: Definition, Location, and Function
Definition The medulla oblongata is part of the autonomous central nervous system that directly connects the brainstem with the spinal cord. Medulla is Latin for middle; oblongata …
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Median Nerve: Definition, Anatomy, Distribution & Injury
Definition The median nerve is a branch of the brachial plexus that innervates the palm and back of part of the hand. This mixed nerve …
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Maxilla Bone: Definition, Location, Anatomy, & Type
Definition The maxilla bone or maxillary bone is a fused (paired) bone that provides part or all of the bony structure of the eye sockets, …
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Mandible: Definition, Location, and Anatomy
Definition The mandible is the largest bone in the human skull and supports the lower teeth. It is the only mobile bone of the skull and is essential …
Lacrimal Bone: Definition, Location, Anatomy, & Function
Definition The lacrimal bone or os lacrimale is a paired flat craniofacial bone that provides grooves for parts of the lacrimal apparatus (tear production) and …
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What is the Intrinsic Factor?
Definition Intrinsic factor is produced by specialized mucosa cells called oxyntic cells located in the stomach lining. It is essential for the uptake of vitamin B12 at the …
