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ID number:739454
 
Evaluation:
Published: 22.05.2012.
Language: Latvian
Level: College/University
Literature: n/a
References: Not used
Extract

Embrionālā attīstības laikā sirds un asinsvadu sistēma darbojas dinamiski, piemērojoties dīgļa organisma vajadzībām. Tikko radusies sirds dzen asinis pa visu orgānu sistēmu aizmetņu asinsvadiem, lai tajās iekļūtu skābeklis un tiktu izvadīts CO2 un vielmaiņas galaprodukti. Šie procesi ir saistīti ar diviem ārpusembrija asinsrites lokiem. Asinsrade sākas dzeltenuma maisa sienā. Tā ir intravaskulāra, jo asins šūnas veidojas toposo asinsvadu dobumos.…

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