CB2 Topic 8 Exchange and Transport - Animals. Draw a table to show one way in which each type of blood vessel is adapted for its function? Explain why blood in the vena cava is dark red but the blood in the aorta is bright red? Explain how oxygen is transported from the lungs to tissue?

CB2 Topic 8 Exchange and Transport - Animals. Efficient transport and exchange: Label the correct parts. Draw a table to show one way in which each type of blood vessel is adapted for its function? Arteries – Thick wall to withstand pressure/Elastic muscular wall to squeeze back on the blood and even out the flow Veins – Valves to stop blood flowing the wrong way/thin walls allow skeletal muscles to squeeze the veins and push blood along Capillaries – thin wall to allow fast diffusion Explain why blood in the vena cava is dark red but the blood in the aorta is bright red? Haemoglobin is brighter red when carrying more oxygen Blood in the aorta has just been oxygenated Blood in the veins (vena cava) has returned from the capillaries in the tissue, which have removed the oxygen Explain how oxygen is transported from the lungs to tissue? Oxygen is carried by red blood cells Oxygen diffuses in/out of cells along its concentration gradient Oxygen binds to haemoglobin Blood is pumped by the heart.