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Circulatory system - Blood Vessels and Blood

Study Slideshow

Which blood vessels carry blood away from the heart?

c) Veins

b) Capillaries

a) Arteries

d) Arterioles

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What is the function of capillaries?

c) To transport blood back to the heart

d) To regulate blood pressure

a) To carry blood away from the heart

b) To exchange nutrients and oxygen with tissues

15

What is the main characteristic of arteries?

a) Thin walls

c) Single-cell thick walls

b) Low pressure

d) Thick, elastic walls

15

Why do arteries have thick layers of muscle tissue?

d) To bear high pressures

a) To maintain low pressure

b) To prevent blood clotting

c) To stretch and recoil

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What is the structure of capillary walls?

a) Thick and muscular

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

d) Multilayered

c) Elastic and stretchy

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What is the function of veins?

d) To regulate blood pressure

c) To transport blood back to the heart

a) To exchange substances with cells

b) To transport blood away from the heart

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Why do veins have valves?

b) To prevent blood clotting

a) To maintain high pressure

d) To prevent backward flow of blood

c) To control the flow of oxygen

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

d) Elasticity

b) Low pressure

a) High pressure

c) Permeability

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

b) Equal

d) Variable

c) Larger

a) Smaller

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Which blood vessels have the largest lumens?

a) Arteries

c) Veins

d) Arterioles

b) Capillaries

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

d) To carry blood away from the heart

a) To regulate blood pressure

c) To store excess blood

b) To exchange gases and nutrients with tissues

15

Which blood vessels have the thinnest walls?

a) Arteries

d) Venules

b) Capillaries

c) Veins

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What is the purpose of elastic fibers in arteries?

b) To maintain low pressure

a) To regulate blood flow

d) To prevent blood clotting

c) To stretch and recoil

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What role do veins play in the circulatory system?

d) They regulate body temperature

b) They exchange gases with tissues

a) They carry blood away from the heart

c) They transport blood back to the heart

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What characteristic distinguishes capillaries from other blood vessels?

c) High pressure

b) Permeability - allowing liquids or gases to pass through

a) Thick walls

d) Elasticity

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How do arteries differ from veins in terms of pressure?

b) Veins have higher pressure

c) Arteries and veins have equal pressure

d) Both have low pressure

a) Arteries have higher pressure

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