Across
- 3. A deposit of fatty material on the inner lining of an arterial wall (6)
- 6. Nerve that brings signal to san from medulla of brain to slow down basic heart-beat (5)
- 7. ___________ node: A small mass of tissue that is embedded in the musculature of the right atrium, and that originates the impulses stimulating the heartbeat. (10)
- 9. Any of the minute veins connecting the capillaries with the larger systemic veins (6)
- 11. Nerve that brings signal to san from medulla of brain to speed up basic heart-beat (11)
- 13. ______________ circulation: Circulation system which brings blood to and from the lungs (9)
- 15. Prevent back-flow of blood in veins and ensure venous blood flows in one direction (6)
- 16. ______________ circulation: The branch of the circulatory system that supplies all body organs (apart from lungs) and then returns oxygen-poor blood to the right atrium via the veins. (8)
- 18. The large arterial trunk that carries blood from the left ventricle of the heart to be distributed by branch arteries through the body. (5)
- 21. Hormone secreted by the adrenal gland in response to stress. Also known as adrenaline. (11)
- 22. A tiny blood vessel where substances are exchanged between the blood and the body cells. (9)
- 23. __________________ valves: Valves located between the atrial and ventricular chambers on each side of the heart, prevent backflow into the atria when the ventricles are contracting. (16)
Down
- 1. The artery carrying blood from the right ventricle of the heart to the lungs (9)
- 2. Muscular wall dividing the left and right side of the heart. (6)
- 4. The two upper chambers of the heart (5)
- 5. Death of tissue due to lack of blood supply (10)
- 6. One of two large vessels (superior and inferior) that return deoxygenated blood to the right atrium of the heart. (4, 4)
- 7. Contraction phase of the heartbeat (7)
- 8. Blood vessel carrying blood away from the heart (6)
- 10. A blood vessel that carries blood back to the heart. (4)
- 12. Relaxation phase of the heartbeat (8)
- 14. Describes muscle tissue (heart muscle) that generates its own contractions. (8)
- 17. _____ - ______ valves: Valves in either side of the heart that controls exit from the ventricles, located at base of aorta and pulmonary artery (44685)
- 19. Elastic ___________: Highly elastic branched structures mostly made of the protein elastin which allows arteries to deform and reform (6)
- 20. Any of the small terminal twigs of an artery that ends in capillaries (9)
- 24. The two lower chambers of the heart (10)