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Which of the following blood vessels generally carry oxygenated blood?
a) veins                                 
b) arteries
c) capillaries                         
d) all of these

b

Which of the following artery carry deoxygenated blood?
a) pulmonary artery           
b) renal artery
c) femoral artery                 
d) aorta

a

Arteries branch off into tiny microscopic vessels called……
a) veins                                 
b) venules
c) capillaries                         
d) all of these

c

Explanation:Capillaries are delicate blood vessels that exist throughout your body. They transport blood, nutrients and oxygen to cells in your organs and body systems. Capillaries are the smallest blood vessels in your vascular system.


Which of the following vessels are so narrow that RBCs flow through them in a single line?
a) veins                                 

b) arterioles
c) capillaries                         

d) venules

c

Which of the following blood vessels walls are single cell thick?
a) veins                                 

b) arterioles
c) capillaries                         

d) venules

c

Capillaries join to form smallest ……….
a) veins                                 

b) arterioles
c) capillaries                         
d) all of these

a

Explanation:Veins are blood vessels located throughout your body that collect oxygen-poor blood and return it to your heart. Veins are part of your circulatory system. They work together with other blood vessels and your heart to keep your blood moving. Veins hold most of the blood in your body.