Cardiovascular System

3. Deoxygenated blood enters the heart through this blood vessel into the Right Atrium.
4. These discs look like a dried apricot.
5. This is a complex, connective tissue.
6. Which blood vessel is located deeper within the body?
7. These protect the body from disease and infection.
9. Severe chest pain due to a lack of blood and oxygen to the heart muscle.
10. Which valve does the blood flow through from the Left Atrium to the Left Ventricle?
13. These are thin walled,hollow tubes with a wide lumen.
15. This is a cancer of the blood caused by over-production of white blood cells.
17. Which organ acts as a pump to push blood around the body?
18. Platelets are formed here.
19. The muscular layer of the heart that contracts.
20. The lower chambers of the Heart.
21. This blood disorder is characterised by a decrease in the oxygen carrying ability of blood.
23. The outer layer of the heart that is like a double bag
24. What is the name of the circulation to and from the lungs?
25. Another word for high blood pressure.
26. This gives blood it's characteristic red colour.
27. This is the smooth, frictionless, inner layer of the blood vessel.
30. A function of the Cardiovascular System.
33. The study of Blood.
34. The upper chambers of the Heart.

1. These are also called Thrombocytes.
2. These are veins which have become twisted and enlarged.
6. Blood drains from Arteries into this blood vessel.
8. Capillaries meet and form these.
11. This is a genetic condition that mainly affects people of African descent.
12. What divides the heart into left and right sides?
14. The reading when the heart is contracting.
16. A blood clot.
22. The reading when the heart is relaxing.
28. The cavity where the heart and lungs reside.
29. The thin inner layer of the heart made of epithelial tissue.
31. This is slightly thick and has a straw colour.
32. How many valves are there in the heart?