Table 1.

Channels of Otic Capsule

	Appear	Disappear	Site	Function
Cartilage Canals	11w	21w	Vestibular part of cartilage model	Mediate ossification of cartilage model
Chondro-osseous canals	21w	_	Middle layer otic capsule	?Homeostasis
Volkmann’s Canals	28w	_	All regions of otic? capsule	?Homeostasis
Fissula ante fenestram	11w	_	Near cochlea to vestibule	Mediates ossification throughout life
Vestibular arch: Volkmann’s canals and microcanalization	Before 8w	_	Inner layer vestibular aqueduct and vestibule	?Homeostasis