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Circulatory system - Blood Vessels and Blood

Study Slideshow

Which blood vessels carry blood away from the heart?

d) Arterioles

c) Veins

a) Arteries

b) Capillaries

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What is the function of capillaries?

c) To transport blood back to the heart

b) To exchange nutrients and oxygen with tissues

d) To regulate blood pressure

a) To carry blood away from the heart

15

What is the main characteristic of arteries?

a) Thin walls

b) Low pressure

c) Single-cell thick walls

d) Thick, elastic walls

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Why do arteries have thick layers of muscle tissue?

c) To stretch and recoil

a) To maintain low pressure

b) To prevent blood clotting

d) To bear high pressures

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What is the structure of capillary walls?

d) Multilayered

a) Thick and muscular

c) Elastic and stretchy

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

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What is the function of veins?

b) To transport blood away from the heart

d) To regulate blood pressure

a) To exchange substances with cells

c) To transport blood back to the heart

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Why do veins have valves?

d) To prevent backward flow of blood

b) To prevent blood clotting

c) To control the flow of oxygen

a) To maintain high pressure

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

d) Elasticity

b) Low pressure

c) Permeability

a) High pressure

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

d) Variable

c) Larger

a) Smaller

b) Equal

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Which blood vessels have the largest lumens?

c) Veins

d) Arterioles

b) Capillaries

a) Arteries

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

a) To regulate blood pressure

c) To store excess blood

d) To carry blood away from the heart

b) To exchange gases and nutrients with tissues

15

Which blood vessels have the thinnest walls?

c) Veins

a) Arteries

b) Capillaries

d) Venules

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What is the purpose of elastic fibers in arteries?

c) To stretch and recoil

b) To maintain low pressure

a) To regulate blood flow

d) To prevent blood clotting

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What role do veins play in the circulatory system?

b) They exchange gases with tissues

a) They carry blood away from the heart

d) They regulate body temperature

c) They transport blood back to the heart

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What characteristic distinguishes capillaries from other blood vessels?

d) Elasticity

a) Thick walls

c) High pressure

b) Permeability - allowing liquids or gases to pass through

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How do arteries differ from veins in terms of pressure?

d) Both have low pressure

a) Arteries have higher pressure

b) Veins have higher pressure

c) Arteries and veins have equal pressure

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