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Amiyeliya

Amiyeliya (amyelia; and - – otritsa. Greek myelos – a brain) – one of anomalies of development which is characterized by lack of a spinal cord is frequent +; as a rule, it is combined with an acrania, splitting of the vertebral channel and an anencephalia.

 
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Was considered earlier that yawning enriches an organism with oxygen. However this opinion was disproved. Scientists proved that yawning, the person cools a brain and improves its working capacity.