blood - made up of red blood cells, platelets and plasma, plasma - the liquid content of blood in which nutrients are dissolved, biconcave - shape of a red blood cell, haemoglobin - red protein that binds with oxygen, nucleus - red blood cells do not have this, pathogens - disease causing microorganisms, whitebloodcells - these fight infection, phagocytes - these engulf and destroy pathogens, pulmonaryartery - carries deoxygenated blood from the heart, aorta - carries oxygenated blood from the heart, pulmonaryvein - carries oxygenated blood into the heart, coronaryartery - supplies the heart with oxygenated blood, valves - prevent backflow of blood, thick - describes the arteries' muscular wall, narrow - describes the arteries' lumen,

national 5 biology transport in animals

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