Otic vesicle Otic vesicle Otic vesicle, or auditory vesicle, consists of either of the two sac-like invaginations formed and subsequently closed off during embryonic development. It is part of the neural ectoderm, which will develop into the membranous labyrinth of the inner ear. This labyrinth is a continuous epithelium, giving rise to the vestibular system and auditory components of the inner ear. During the earlier stages of embryogenesis, the otic placode invaginates to produce the otic cup. Thereafter, the otic cup closes off, creating the otic vesicle. Once formed, the otic vesicle will reside next to the neural tube medially, and on
Crown (anatomy) crown and occiput, is sometimes called the pileum. A bird with a crest covering the pileum may be described as "pileated", e.g. the pileated woodpecker. In whale anatomy the crown is the bulge on the head through which the blow-holes emerge. Crown (anatomy) The crown is the top of the head, or the whole head. Crown can mean the top of the head and it can also mean the whole head. In the study of human anatomy the terms "Calvaria, "skullcap", "skull cap", or the "roof of the cranial cavity" are used for the top part of the head. In