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<a accesskey="3" href="page.php?w=hematopoietic_stem_cell&amp;p=2">3.Next</a>
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<p><b>Hematopoietic stem cells</b> (<b>HSCs</b>) are the <a href="page.php?w=stem_cell">stem cell</a>s that give rise to other <a href="page.php?w=blood_cell">blood cell</a>s. This process is called <a href="page.php?w=haematopoiesis">haematopoiesis</a>. In <a href="page.php?w=vertebrate">vertebrate</a>s, the first definitive HSCs arise from the ventral endothelial wall of the embryonic aorta within the (midgestational) <a href="page.php?w=aorta-gonad-mesonephros">aorta-gonad-mesonephros</a> region, through a process known as endothelial-to-hematopoietic</p><p>
<a accesskey="3" href="page.php?w=hematopoietic_stem_cell&amp;p=2">3.Next</a>
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