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Forum => Cafe => Topic started by: Yvette on 15 Oct 2012 04:47PM

Title: Odd questions that have no answer on Google.
Post by: Yvette on 15 Oct 2012 04:47PM
How do blood cells get from the bone marrow in bones into the blood stream?

Bones are dense and do not have blood vessels.  So how do the blood cells get out of the bones and into the blood system?

I can't find an answer on Google.
Title: Re: Odd questions that have no answer on Google.
Post by: Hurtyback on 15 Oct 2012 07:48PM
Bone marrow actually looks very 'spongy' and has a very good blood supply, this is how the blood cells get into the general circulation. People who suffer a fracture of large bones, such as the femur, can actally loose a lot of blood.
Title: Re: Odd questions that have no answer on Google.
Post by: Yvette on 15 Oct 2012 07:53PM
The bone marrow is *inside* the bones, which are hard and dense.  So how does it get out?
Title: Re: Odd questions that have no answer on Google.
Post by: Hurtyback on 15 Oct 2012 07:55PM
The blood vessels run through the bones, from the bone marrow to the outside, via little channels called 'foramina' (singular 'foramen').
Title: Re: Odd questions that have no answer on Google.
Post by: Yvette on 15 Oct 2012 07:56PM
Thank you.   >tah<    >thumbsup<
Title: Re: Odd questions that have no answer on Google.
Post by: Hurtyback on 15 Oct 2012 07:58PM
No problem, if was good for me to dredge up the basic anatomy that I learned so many years ago  :-)
Title: Re: Odd questions that have no answer on Google.
Post by: Dic Penderyn on 20 Oct 2012 01:27AM
yup bones are living tissue and are enervated and have vasculation they are also continually being remodeled.
Title: Re: Odd questions that have no answer on Google.
Post by: auntieCtheM on 20 Oct 2012 07:48PM
I wish my whole body could be remodelled.