Circulatory System

3. Walls collect and expel blood received from an atrium towards peripheral beds within the body and lungs
4. Circuit circulation of blood in the blood vessels of the myocardium
8. hollow muscular organ that pumps blood through the circulatory system
10. each of the two upper cavities of the heart in which blood is passed to ventricles
11. System get food and oxygen to all the cells in the body
13. Circuit carries blood away from the heart to the rest of the organs and tissues
14. a regulatory substance to stimulate specific tissues and cells into action
16. the phase of the heartbeat when the heart contracts and pumps blood from the chambers into the arteries

1. Veins a vein carrying oxygenated blood from the lungs to the left atrium of the heart
2. Wastes substances left over that can not be used again and must be excreted
4. Muscle muscle tissue of the heart
5. Cava a large vein carrying deoxygenated blood into the heart
6. substance that provides essential nourishment for growth
7. fine branching blood vessels that form a network between the arterioles and venules
9. Vessels tubular structure carrying blood through the tissues and organs
12. the phase of the heartbeat when the heart muscle relaxes and allows the chamber to fill with blood
15. life supporting component of the air