Circulatory System

2. is an elastic blood vessel that transports blood from various regions of the body to the heart
5. The phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.
7. The main artery of the body, supplying oxygenated blood to the circulatory system.
9. a vein carrying oxygenated blood from the lungs to the left atrium of the heart
10. The phase of the heartbeat when the heart muscle contracts and pumps blood from the chambers into the arteries.
13. is a section of nodal tissue that lies on the right side of the partition that divides the atria, near the bottom of the right atrium.
15. is located on the right side of the heart. Oxygenated blood from the left ventricle is pumped throughout the body as the mitral valve stays closed during compression. Also functions similarly to maintain blood flow in one direction only.
16. A partition separating two chambers, such as that between the nostrils or the chambers of the heart.
17. A very small vein, esp. one collecting blood from the capillaries.
18. is one of two large chambers that collect and expel blood received from an atrium towards the peripheral beds within the body and lungs
20. a small branch of an artery leading into capillaries

1. A rhythmical throbbing of the arteries as blood is propelled through them.
3. is a section of nodal tissue that is located in the upper wall of the right atrium. This node is also referred to as the pacemaker of the heart.
4. an extremely small blood vessel located within the tissues of the body, that transports blood from arteries to veins
6. valve with three cusps situated between the right atrium and the right ventricle; allows blood to pass from atrium to ventricle and closes to prevent backflow when the ventricle contracts
8. receives blood from the head and arms and chest and empties into the right atrium of the heart; formed from the azygos and both brachiocephalic veins
11. refers to a protein, found in red blood cells, that is responsible for carrying oxygen from the lungs to all other tissues of the body
12. is the pressure exerted by circulating blood upon the walls of blood vessels, and is one of the principal vital signs
13. blood vessels which carry blood away from the heart
14. receives blood from lower limbs and abdominal organs and empties into the posterior part of the right atrium of the heart; formed from the union of the two iliac veins
19. in vertebrates and the higher invertebrates, heart chamber that receives blood into the heart and drives it into a ventricle, or chamber, for pumping blood away from the heart.