Across
- 2. a metal mesh placed in a blocked or partially blocked artery. They are used to open up the blood vessel by the inflation of a tiny balloon
- 4. surround the stomata in the leaves of plants and control their opening and closing
- 5. the large blood vessel that carries oxygenated blood from the lungs back to the left atrium of the heart
- 7. blood cells involved in the immune system of the body. They engulf pathogens and make antibodies and antitoxins
- 8. fragments of cells in the blood that play a vital role in the clotting mechanism of the blood
- 11. blood vessels that carry blood away from the heart. They usually carry deoxygenated blood and have valves to prevent the backflow of blood
- 12. drugs used to lower blood cholesterol levels and improve the balance of high- to low-density lipoproteins in the blood
- 14. the blood vessels that supply oxygenated blood to the heart muscle
- 15. the loss of water vapour from the leaves of plants through the stomata when they are opened to allow gas exchange for photosynthesis. It involves evaporation from the surface of the cells and diffusion through the stomata
- 16. the large blood vessel that takes deoxygenated blood from the right ventricle of the heart to the lungs
- 18. the clear yellow-liquid part of the blood that carries dissolved substances and blood cells around the body
- 19. the upper chambers of the heart
- 21. the upper layer of the mesophyll tissue in plant leaves made up of closely packed cells that contain many chloroplasts for photosynthesis
- 25. the circulation of blood from the heart to the lungs is separate from the circulation of blood from the heart to the rest of the body
- 26. the smallest blood vessels. They run between individual cells and have a wall that is only one cell thick
- 27. the living transport tissue in plants that carries dissolved food (sugars) around the plant
Down
- 1. the red pigment that carries oxygen around the body in the red blood cells
- 3. the movement of sugars from the leaves to the rest of the plant through the phloem
- 6. biconcave cells that contain the red pigment haemoglobin and carry oxygen around the body in the blood
- 9. chambers of the heart that contract to force blood out of the heart
- 10. blood vessels that carry blood away from the heart. They usually carry oxygenated blood and have a pulse
- 12. the lower layer of mesophyll tissue in plant leaves that contains some chloroplasts and many large air spaces to give a big surface area for the exchange of gases
- 13. the name given to cells that make up the epidermis or outer layer of an organism
- 17. insects that penetrate the plant phloem and feed on dissolved food. They acts as vectors that carry pathogenic viruses, bacteria and fungi into healthy plant tissue
- 20. the large vein that brings deoxygenated blood from the body into the heart
- 22. the waste product formed by the breakdown of excess amino acids in the liver
- 23. the artery that leaves the heart from the left ventricle and carries oxygenated blood to the body
- 24. the non-living transport tissue in plants that transports water from the roots to the leaves and shoots