Subject: is human blood a colloid or a suspension?

I already know that human blood is a heterogeneous mixture but is it classified 
into a suspension, colloid,or suspension of colloids maybe?  i've surfed the 
internet and found that most of the answers assure that blood is a suspension 
but i know that a suspension is a mixture that appears uniform while being 
stirred but seperates into different phases when agitation ceases. i've got 
this definition from my chemistry book: Holt Chemistry Visualizing Matter. but 
isnt blood seperated into its different phases by centrifuging which ihas 
everything to do with stirring and shaking but nothin with  ceasing?! s if it 
is a  colloid then why? i have a 
mini research concerning this subject and i am very confused now. please try to 
notify me with a reasonable answer with which i could be satisfied and 
convinced. please respond as soon as u can.

Re: is human blood a colloid or a suspension?