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Part one
Blood is pumped by the left side of the heart to the other tissues in the body. This blood contains lots of oxyhaemoglobin in the red blood cells. Our tissues get (1) from the blood for energy. Our tissues need the (2) acids in the blood for growth and repair. The blood also carries vitamins to keep us healthy. White blood cells can squeeze out of our (3) into our tissues to fight disease.
Blood vessels called (4) carry blood away from the heart. Blood is carried from the small intestines by the (5) portal vein to the liver where glucose is turned into glycogen. Blood travels back to the heart in (6) .
Part two
7. Name the protein found in red blood cells.
8. Which side of the heart has thicker muscles?
9. What do platelets help blood to do?
10. What does a white blood cell have that a red blood cell doesn't? A
