Chapters 7 to 8

3. the narrowing of an arteriole.
5. tissue lining the inner surface of a structure such as blood vessel.
9. qualifies the curve showing the percentage saturation of haemoglobin with oxygen, plotted against the partial pressure of oxygen.
11. Term referring to tubes or vessels
13. vessel that carries low-pressure blood back to the heart.
15. a pore in the epidermis of a leaf.
16. small artery
18. plant tissue responsible for transport of water and minerals
19. basic plant tissue used as packing tissue
20. qualifies the shift decribing the decrease of affinityof haemoglobin for oxygen when carbon dioxide is present

1. a plant adapted to survicve in dry conditions.
2. qualify the cirrculation that carries blood from the heart to all of the body except the gas exchange surface, and then back to the heart.
4. the main material in wood
6. layer of cells surrounding the vascular tissue of plants
7. the non-living system of interconnected cell walls extending throughout a plant.
8. the liquid componenet of blood.
10. a site in a plant which received food from another part of the plant.
12. qualify the valves in the veins.
14. the stage of the cardiac cycle when the muscle in the walls of the heart relaxees.
15. layer of tissue separating the left from the right sides of the heart.
17. plant tissue responsible for the transport of assimilates