3. Blood vessels Deoxygenated blood Oxygenated blood Low pressure/Thin walls/ large hole/ valves High pressure/Thick muscular walls/ small hole/ no valves One cell thick Where gas exchange occurs with cells Away from heart To the heart You need to draw these You need to write down a table of differences
4.
5. Question 4a) Which diagram shows a slice across an artery, X or Y? b) Write down one difference between the wall of an artery and the wall of a vein. c) Write down one difference between the blood in most arteries and the blood in most veins. d) What would you find in a leg vein which is not shown in the diagram?
7. Blood cells Carry oxygen Contain the red pigment haemoglobin Blood clotting Fighting infection You need to draw these
8. 1 is about 44% of the blood 6 is a flowing liquid 3 are disc shaped 9 help to seal cuts 5 are fragments of cells 7 can change shape 4 contains haemoglobin 8 carries oxygen 2 contains dissolved nutrients 10 help to protect you from disease Statements Appearance Platelets White blood cells Red blood cells Plasma
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