• Question: How do we get more blood as we grow from a baby to a child to a teen, etc.?

    Asked by tomalie to Viv, Sean, Lena, Laura, Asif on 15 Mar 2012.
    • Photo: Sean Murphy

      Sean Murphy answered on 14 Mar 2012:

      When we are very young, blood formation occurs in the spleen, liver and lymph nodes. When we get older and bone marrow develops, it eventually assumes the task of forming most of the blood cells for the entire organism.

    • Photo: Laura Waters

      Laura Waters answered on 15 Mar 2012:

      Blood can be made by our body and we make as much as we need so that is why when we donate blood it is soon replaced and we recover. Well, unless we lose two much and then we can’t recover!