trinity 1 the circulatory system
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what is blood made up of?
plasma, red blood cells, white blood cells and platelets
what blood is carried around the body in three different types of blood vessels?
artery, vein, capillary
what is the job of red blood cells?
what is the job of white blood cells?
defends against diseases
what is the job of platelet?
helps blood to clot
how many blood cells would fit into 1cm3?
5 000 000 000
on average how many times does our heart pump blood each day?
what does blood also contain?
tiny cell fragments called platelets
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