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OK, I know that blood cells are made in bone marrow, but how do they get out of the middle of the bones?
Do they just...pop out? Is there some release portal where the new blood cells come out? For that matter, how does blood get in the bones? I mean, they're hard. So how do the cells go back and forth?
1 Answer
- phantomlimb7Lv 61 decade agoFavorite Answer
Bones are actually directly connect to the blood stream through the capillaries. Only the crystalline structure of bone is hard, and it's permeated by thousands of tiny pores. The cells migrate from the marrow into the blood stream though the capillary system, same as any other cell.
Source(s): RN
