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In anatomy, the round window and oval window are also known as the fenestra rotunda and the fenestra ovalis. [3] In microanatomy, fenestrae are found in endothelium of fenestrated capillaries, enabling the rapid exchange of molecules between the blood and surrounding tissue. [4] The elastic layer of the tunica intima is a fenestrated membrane.
The antorbital fenestra in relation to the other skull openings in the dinosaur Massospondylus. An antorbital fenestra (plural: fenestrae) is an opening in the skull that is in front of the eye sockets. This skull character is largely associated with archosauriforms, first appearing during the Triassic Period.
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The infratemporal fenestra, also called the lateral temporal fenestra or lower temporal fenestra, is the lower of the two and is exposed primarily in lateral (side) view. Temporal fenestrae in relation to the other skull openings in the dinosaur Massospondylus , a type of diapsid .
The oval window (or fenestra vestibuli or fenestra ovalis) is a connective tissue membrane-covered opening from the middle ear to the cochlea of the inner ear.. Vibrations that contact the tympanic membrane travel through the three ossicles and into the inner ear.
The round window is situated below (inferior to) and a little behind (posterior to) the oval window, from which it is separated by a rounded elevation, the promontory.. It is located at the bottom of a funnel-shaped depression (the round window niche) and, in the macerated bone, opens into the cochlea of the internal ear; in the fresh state it is closed by a membrane, the secondary tympanic ...
infratemporal fenestra The infratemporal fenestra (also: lateral temporal fenestra) is a major opening on the side of the skull behind the orbit. [1]: 140 It is bordered by the postorbital in its upper front, the squamosal in its upper back, the quadratojugal in its lower back, and the jugal in its lower front corner. [25]: 37 intercentrum
The anterior part contains the fenestra ovalis and seems to be analogous to the vestibular duct, whereas the posterior part is analogous to the recess for the tympanic duct. [ 1 ] CT-volume-rendered images of the major openings for the cranial nerves and blood vessels of the holotype braincase of Sarahsaurus aurifontanalis .