Chapter 8, The Heart & Blood vessels

2. a hollow muscular organ that pumps the blood through the circulatory system by rhythmic contraction and dilation
5. the phase of the heartbeat when the heart
6. the red liquid that circulates in the arteries and veins of humans and other vertebrate animals, carrying oxygen to and carbon dioxide from the tissues of the body
7. a blood vessel that carries blood from the heart to tissues and organs in the body
10. a very small vein, especially one collecting blood from the capillaries
13. biological one-way valves that control blood flow through the heart, ensuring it moves in the correct direction and prevents backflow
15. known as a brain attack or cerebrovascular accident (CVA), is a medical emergency that occurs when blood flow to the brain is interrupted
17. the four main divisions of the heart that receive and pump blood throughout the body
18. a condition where the force of blood pushing against the artery walls is consistently too high, often measured as 130/80 mmHg or higher
20. period of contraction of the ventricles of the heart that occurs between the first and second heart sounds of the cardiac cycle

1. relaxes and allows the chambers to fill with blood
3. a disease of the arteries characterized by the deposition of plaques of fatty material on their inner walls
4. a tubular structure carrying blood through the tissues and organs; a vein, artery, or capillary
8. delicate blood vessels (tubes that hold blood) throughout your body
9. a type of chest pain or discomfort caused by a reduced blood flow to the heart muscle
11. cancer on lymphatic cells
12. enlarged lymph nodes signal an immune response
14. a small branch of an artery leading into capillaries
16. swelling due to blocked lymph drainage
19. any of the tubes forming part of the blood circulation system of the body, carrying in most cases oxygen-depleted blood toward the heart