Circulatory System

3. white blood cell that is a part of the immune system, defending against pathogens and infections
4. carries deoxygenated blood from the heart to the lungs
9. chamber that brings deoxygenated blood from the upper body back to the heart
10. blood vessels that are thick-walled and carry oxygenated blood (except in the lungs) away from the heart, designed to withstand high pressure from the heart contractions due to their close-proximity to the heart
11. “tunica” — middle layer of blood vessel that is comprised of smooth muscle tissue that dilates and contracts blood vessels
13. lines chambers and valves of the heart to divide cardiac muscles from the bloodstream
14. largest artery in the body that carries oxygenated blood from the heart to the rest of the body
15. blood vessel that exchanges oxygen, waste, and nutrients between the bloodstream and the body’s tissues
16. outer protective layer of heart composed of adipose and simple squamous epithelial tissue
18. small cell fragment involved in blood clotting (hemostasis) to prevent excessive bleeding.
21. water-based extracellular matrix that contains blood cells, proteins, and hormones
22. veins, arteries, and capillaries; an organic network of tunnels that carries blood throughout the body
25. chamber that deoxygenated blood from the lower body back to the heart

1. is responsible for transporting nutrients and oxygen throughout the body and ridding the body of CO2
2. vein that carries oxygenated blood from the lungs back to the heart
5. number (word) of chambers in the heart
6. cardiac muscle cells that make up myocardium
7. red blood cells that carry oxygen and nutrients to the rest of the body via the protein hemoglobin
8. system of veins and capillaries that conveys blood from intestines, pancreas, gallbladder, and spleen to the LIVER to process nutrients
11. muscular tissue of the heart that pumps involuntarily
12. a diseased caused by mutations in hemoglobin, making blood cells hard and sticky and blocking blood flow
17. “tunica” — innermost layer of blood vessel that regulates blood pressure and declots blood
19. connective tissue that carries the oxygen, white blood cells, nutrients, and waste along the blood vessels
20. “tunica” — outermost layer of blood vessel that diffuses oxygen and nutrients into bloodstream and provides structure
23. blood vessel that carries deoxygenated blood (not pulmonary vein) back to the heart, thin-walled with valves to prevent backflow, replying on muscle movement to push blood
24. a muscular organ at the center of the circulatory system that pumps the blood throughout the network of veins of the body