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Circulatory system - Blood Vessels and Blood

Study Slideshow

Which blood vessels carry blood away from the heart?

d) Arterioles

b) Capillaries

a) Arteries

c) Veins

15

What is the function of capillaries?

c) To transport blood back to the heart

d) To regulate blood pressure

b) To exchange nutrients and oxygen with tissues

a) To carry blood away from the heart

15

What is the main characteristic of arteries?

c) Single-cell thick walls

d) Thick, elastic walls

a) Thin walls

b) Low pressure

15

Why do arteries have thick layers of muscle tissue?

a) To maintain low pressure

b) To prevent blood clotting

d) To bear high pressures

c) To stretch and recoil

15

What is the structure of capillary walls?

b) Thin and permeable-allowing liquids/gases to pass through

c) Elastic and stretchy

a) Thick and muscular

d) Multilayered

15

What is the function of veins?

b) To transport blood away from the heart

c) To transport blood back to the heart

a) To exchange substances with cells

d) To regulate blood pressure

15

Why do veins have valves?

a) To maintain high pressure

b) To prevent blood clotting

c) To control the flow of oxygen

d) To prevent backward flow of blood

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What is the primary factor influencing the flow rate of blood in capillaries?

c) Permeability

a) High pressure

d) Elasticity

b) Low pressure

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What is the typical cross-sectional area of capillaries compared to arteries?

b) Equal

a) Smaller

c) Larger

d) Variable

15

Which blood vessels have the largest lumens?

d) Arterioles

c) Veins

a) Arteries

b) Capillaries

15

What is the primary function of capillaries in the circulatory system?

d) To carry blood away from the heart

b) To exchange gases and nutrients with tissues

a) To regulate blood pressure

c) To store excess blood

15

Which blood vessels have the thinnest walls?

d) Venules

a) Arteries

b) Capillaries

c) Veins

15

What is the purpose of elastic fibers in arteries?

b) To maintain low pressure

c) To stretch and recoil

a) To regulate blood flow

d) To prevent blood clotting

15

What role do veins play in the circulatory system?

b) They exchange gases with tissues

d) They regulate body temperature

c) They transport blood back to the heart

a) They carry blood away from the heart

15

What characteristic distinguishes capillaries from other blood vessels?

b) Permeability - allowing liquids or gases to pass through

c) High pressure

a) Thick walls

d) Elasticity

15

How do arteries differ from veins in terms of pressure?

d) Both have low pressure

c) Arteries and veins have equal pressure

a) Arteries have higher pressure

b) Veins have higher pressure

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Bianco's Circulatory system - Blood Vessels and ...