RED BLOOD CELLS no nucleus so they are packed with haemoglobin.
haemoglobin combines easily with oxygen.
haemoglobin+oxygen-->oxyhaemoglobin
white blood cells a) engulfing white cells
b) antibody producing cells.
Platelets help the blood to clot at a wound.
Plasma carries almost everything. including..... *red and white blood cells *digested food *amino acids *carbon dioxide *urea
*hormones
arteries carry oxygenated bloodaway from the heart.
veins carry deoxygenated bloodback to the heart.
Capillaires are only 1 cell thick. They deliver food and oxygen to the body cells and take waste products away.
cardiac arrest= the coronary artery becomes blocked by fatty deposits. Smoking and high blood pressure also damage the arteries making it easier for the fats to build up
to prevent heart attack: *cut down on fatty foods *eat at least 5 portions of fruit and veg a day *get regular exercise *avoid stress *cut down on salt