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Bluid is a liquid fand in humans an maist ainimals. Bluid is pushed throu the organism by the hert. Bluid brings nutrients an oxygen tae wir tishies. It taks awa waste an carbon dioxide frae tishies an aw. It brings bluid tae an frae the hert.

Bluid is made up o bluid plasma an various cells — reid bluid cells, white bluid cells an platelets. Platelets help bluid clot. Haemoglobin is fand in reid bluid cells. White bluid cells help fecht infections an heal wounds.