| 释义 |
lens pits lens pitsthe paired depressions formed in the superficial ectoderm of the embryonic head as the lens placodes sink in toward the optic cup; the external openings of the pits are closed as the lens vesicles are formed.lens pits (lenz pits) The paired depressions formed in the surface ectoderm of the embryonic head as the lens placodes sink in toward the optic cup; the external openings of the pits are closed as the lens vesicles form. |