Human anatomy, including structure and development and practical considerations . elioid covering. The main sac of the otic vesicle from which the diverticula arise constitutes theprimitive membranous vestibule, and later subdivides into the saccule and utricle. This separa-tion begins as an annular constriction of the primitive vestibule, incompletely dividing the vesicleinto two comi^artments. The still relatively large ductus endolymphaticus, the direct successorof the recessus endolymphaticus, unitc-s with the narrow canal connecting these vesicles in sucha manner that each spac
Human anatomy, including structure and development and practical considerations . elioid covering. The main sac of the otic vesicle from which the diverticula arise constitutes theprimitive membranous vestibule, and later subdivides into the saccule and utricle. This separa-tion begins as an annular constriction of the primitive vestibule, incompletely dividing the vesicleinto two comi^artments. The still relatively large ductus endolymphaticus, the direct successorof the recessus endolymphaticus, unitc-s with the narrow canal connecting these vesicles in sucha manner that each space receives one of a pair of converging limbs, an arrangement foreshad-owing the permanent relations of the parts. Even before the subdivision of the primitive vestibule is established, the vestibular endof the cochlear canal becomes constricted, so that communication between this tube and thefuture saccule is maintained by only a narrow passage, later the canalir, reuniens. The de\el-opment of the macula; acustica; of the saccule and utricle depends upon the sjiecialization of. Part of frontal section of head of ; otic sac is separated from ectoblastand beginning; to clonLjate. X 40. i)i:\ i:lopment oi the ear. 1525 kyr-A -x:^^ Wall ofhraiii-vesick-
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
