Across
- 1. located between the left ventricle and aorta.
- 2. smooth layer of cells that lines the inside of the heart.
- 5. is a double layered membrane,or sac that covers the outside of the heart.
- 7. is a muscular wall that separates the heart to left side and right side.
- 8. blood vessels that carry blood back to the heart.
- 11. flows through the circulatory system is often called tissue because it contains many cells.
- 12. cycle consists of a brief period of rest.
- 14. pumps blood in the pulmonary artery.
- 15. described as fragments of cells for lacking nuclei, vary in size and shape.
- 17. receives oxygenated blood from the lungs.
- 18. abnormal heart beats and can be mild or life threatening.
- 19. pumps blood into the aorta for transport to the body cells.
- 21. located between the right atrium and pulmonary artery.
- 23. produced in the red bone marrow at rate about 1 million per minute.
Down
- 1. carry blood away from the heart.
- 3. muscular middle layer
- 4. located between the left and right atrium.
- 6. transports oxygen and nutrients to the body cells.
- 9. period of ventricular contraction.
- 10. connect arterioles with venules, the smallest veins.
- 13. is 90% water with many dissolved, or suspended, substances.
- 16. located between the left atrium and ventricle.
- 19. known as white blood cells
- 20. gives blood its characteristic red color
- 22. receives blood as it returns from the body cells.