Questions. Unit a
What are the three major types of blood vessels in the body?
What blood vessels lead blood away from the heart?
3. What tissue composes the arterial wall?
4. Why are arterial walls so strong and elastic?
5. What blood vessels are called arterioles?
6. What blood vessels do arterioles carry blood to?
7. How are the tiniest blood vessels called?
8. How thick are capillaries?
9. What kind of blood do capillaries carry to the body cells?
10.What blood vessels carry nutrient-rich, oxygenated blood from the arteries and arterioles to the body cells?
11. Where to do nutrients and oxygen pass from the capillary bloodstream?
12. Why is the passage of substances from the bloodstream into the tissue fluid and vice versa possible?
13. What substances pass out of the cells into the capillaries?
14. Where to does waste-filled blood flow from the capillaries?
15. What blood vessels are called venules?
16. What blood vessels conduct waste-filled blood toward the heart from the tissues?
17. What blood vessels are called veins?
18. What blood vessels are thinner-walled, veins or arteries?
19. What differs the walls of arteries from those of the veins?
20. In what blood vessels is the blood pressure higher?
21. What regulates the movement of blood in veins?
22. What is the main function of the venous valves?
23. What forms the circulatory system?
24. What for does the circulatory system serve?
25. What blood vessels carry deoxygenated blood to the heart?
26. What side of the heart does deoxygenated blood enter?
27.What is the only artery carrying deoxygenated blood?
Where do the branches of the pulmonary artery lead to?
When does blood absorb oxygen?
What is the only vein carrying oxygenated blood?
What are the two circulations in a human body?
What is included into the pulmonary circulation?
What is the systemic circulation composed of?
How is the process of combining oxygen with nutritional substances in a cell called?
What is released as the result of oxidation?
What does energy released in oxidation serve for?
Into what structures do arteries (veins) branch?
What side of the heart pumps blood rich in oxygen?
What side of the heart pumps blood rich in carbon dioxide?
40. Through what blood vessel does the newly oxygenated blood return to the heart?
41. What artery in the body is considered to be the largest one?
42. What is known as ascending aorta?
43. What is known as descending aorta?
44. What does the aorta branch into?
45. What are the waste products of the combination of food with oxygen in the body cell?
46. What is characteristic of arterial wall structure?
47. What tissue composes the venous wall?
48. How is the blood vessel system arranged?
49. What does the word “capillary” mean in Latin?
50. Why veins cannot withstand high blood pressure?
51. Where is the heart located?
52. How many chambers does the heart consist of?
53. What are the chambers of the heart?
54.What kind of pump is the heart?
55. With what mechanism can the human heart be compared?
56. What blood vessels bring deoxygenated blood to the right atrium?
57.Where is the tricuspid valve located?
58.What is the main function of the tricuspid valve?
59.What do the cusps of the tricuspid valve form?
60.Does the tricuspid valve stay shut during the contraction of the right ventricle?
61.Where is the mitral valve located?
62.What is the main function of the mitral valve?
63.Which of the heart chambers has the thickest walls?
64.Why does the left ventricle have the thickest walls?
65.Trough what valve is the blood forced from the left ventricle into the aorta?
66.What is the main function of the aortic valve?
67.What are the four chambers of the heart separated by?
68.What are septa?
69.What is the main function of the interatrial septum?
70. What is the main function of the interventricular septum?
71.What layers is the heart wall composed of?
72.What is endocardium?
73. What tissue are the valves of the heart formed by?
74.What is myocardium?
75.What is the thickest layer of the heart wall?
76.What is epicardium?
77.What is pericardium?
78. What is pericardium attached to?
79. What are the phases of the heartbeat?
80.What is diastole?
81. What is systole?
82.When does systole begin?
83.What is shorter, systole or diastole?
84.Where does the electrical impulse initiating the heartbeat originate?
85.Where is the sinoatrial node located?
86.What is called the pace-maker of the heart?
87.Where to does the wave of electricity pass from the pace-maker?
88.Where is the atrioventricular node located?
89.What is the main function of the atrioventricular node?
90.Where does the atrioventricular node pass the excitation wave to?
91.What is bundle of His?
92.What does the electrical wave coming from the bundle of His stimulate?
93.Where does the electrical wave from the bundle of His pass to?
94.What part of the nervous system can the heartbeat be regulated by?
95.What nerves can carry impulses to regulate the heartbeat?