Fenestra (anatomy)

A fenestra is, in anatomy, the term used to refer to natural (as opposed to traumatic) openings in the skull or other bones in vertebrates. The trilobite Fenestraspis possesses extensive fenestrae in the posterior part of the body and apparently of the thorax.

Other fenestrae

 * Ear fenestrae
 * fenestra cochleae
 * fenestra ovalis (fenestra vestibuli)


 * Pelvic fenestra
 * Ilio–ischiatic fenestra, in the pelvis of Palaeognathae