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.

Skull fenestrae

Main article: Skull § Fenestrae

Other fenestrae

Ear fenestrae
Pelvic fenestra

See also