Question

BLOOD WESSELS - CIRCULAT1ON

Matching

Match the term on be Left with the proper selection on the right.

27. Arteries

A. Smooth muscle cells that guard entrance to capillaries

28. Veins.

B. carry blood to the heart

29. Capillaries

C. Carry blood into venules

30. Tunica externa

D. Carry blood away from the heart

31. Precapillary sphincters

F. Largest artery

32. Superior vena cava

G. Outermost layer of arteries and veins

Wiuktiplo Choice

Cirde the cortecf urtwer.

34 . The aorta carries blood out of the:

A. Right atrium

B. Left atrium

C. Right ventricle

D. Left ventricle F None of the above

35: The superior vena cava returns blood to the:

A. Lefteatrium

B. Left ventricle C Right atrium

D. Right ventricle

E. None of the above

36. Which one of the following vessel's walls are made up entirely of endothelial cells?

A Vein

B. Capillary

C Artery

D. Veruule

E. Arteriole

37. The is made up of smooth muscle.

A. Tunica media

B. Tunica adventitia

C. Tunica intima

D. Findothelium

F Myocardium

39 The function as exchange vessels.

A. Venules

B. Capillaries

C Arteries

D. Arterioles

B. Veins

Answer 1

27. D. Carry blood away from heart

The arteries carry blood from heart to lungs and to various parts of our body.

28. B. Carry blood to the heart

The veins carry blood from the systemic circulation, from various parts of body and also from lungs to the heart.

29. C. Carry blood into venules

These vessels carry blood into the venules. These act as connection between arterial and venular blood supply system.

30.G. Outermost layer of arteries and veins

This is the outer lining of the vessels, both arteries and veins

31. A. Smooth muscle cells that guard entrance of capillaries

These are present at entrance of capillaries and control the flow of blood by constriction and relaxation.

32. E. Largest vein

This is the vein that carries blood collected from all parts of body by various veins to heart.

33. F. Largest artery

This carries out blood from heart into various smaller arteries that supply oxygenated blood to various body parts except lungs.

34. D. Left ventricle

This chamber of the heart pumps oxygenated blood collected from left atrium into the aorta to supply to various body parts.

35. C. Right atrium

This receives all the deoxygenated blood collected from various parts of body by various veins.

36. B. Capillary

These are smallest blood vessels which are composed of only one layered wall which is endothelium.

37. A. Tunica media

This forms the muscle containing layer of vessel wall. This helps in stability and providing contracting as well as relaxation of muscles for long duration which help alter blood pressure.

38. B. Capillaries

These are called exchange vessels cause the gases are exchanged through these vessels between blood and tissues. They form a link between arterial and venular blood systems.

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