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atlas
Значение термина atlas в knolik
atlas - atlas
atlas - First vertebra of tetrapods, modified for joint with skull. In amniotes, which have freer head movement, it is modified further than in Amphibia; it consists of a simple bony ring, and there is a peg (odontoid process) on the next vertebra (axis) which projects forwards into the ring (through which spinal cord also runs). This peg represents part of the atlas (its centrum), which has become detached and fused to the axis. Nodding the head takes place at skull-atlas joint; rotating head at atlas-axis joint.
Рядом со словом atlas в knolik
| atavism | В начало буква "" буквосочетание "" | atp |
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