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Blastotsel

Blastotsel (blastocoelia – LNE (The Leningrad embryological nomenclature); Greek blastos – a sprout, a germ + Greek koilos – hollow; synonyms: a segmentatsionny cavity, a crushing cavity) – the blastula cavity turning during further development in some animals into primary perigastrium with its derivatives. At a germ of the person бластоцель is absent.

 
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Average life expectancy of lefthanders is less, than right-handed persons.