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Circulatory system - Blood Vessels and Blood

Study Slideshow

Which blood vessels carry blood away from the heart?

c) Veins

a) Arteries

b) Capillaries

d) Arterioles

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What is the function of capillaries?

c) To transport blood back to the heart

a) To carry blood away from the heart

d) To regulate blood pressure

b) To exchange nutrients and oxygen with tissues

15

What is the main characteristic of arteries?

a) Thin walls

b) Low pressure

c) Single-cell thick walls

d) Thick, elastic walls

15

Why do arteries have thick layers of muscle tissue?

a) To maintain low pressure

b) To prevent blood clotting

c) To stretch and recoil

d) To bear high pressures

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

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What is the function of veins?

d) To regulate blood pressure

b) To transport blood away from the heart

c) To transport blood back to the heart

a) To exchange substances with cells

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Why do veins have valves?

b) To prevent blood clotting

c) To control the flow of oxygen

d) To prevent backward flow of blood

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

a) High pressure

c) Permeability

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

d) Variable

a) Smaller

b) Equal

c) Larger

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Which blood vessels have the largest lumens?

b) Capillaries

c) Veins

d) Arterioles

a) Arteries

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

b) To exchange gases and nutrients with tissues

c) To store excess blood

a) To regulate blood pressure

d) To carry blood away from the heart

15

Which blood vessels have the thinnest walls?

a) Arteries

d) Venules

c) Veins

b) Capillaries

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What is the purpose of elastic fibers in arteries?

c) To stretch and recoil

a) To regulate blood flow

d) To prevent blood clotting

b) To maintain low pressure

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What role do veins play in the circulatory system?

c) They transport blood back to the heart

a) They carry blood away from the heart

b) They exchange gases with tissues

d) They regulate body temperature

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What characteristic distinguishes capillaries from other blood vessels?

d) Elasticity

c) High pressure

a) Thick walls

b) Permeability - allowing liquids or gases to pass through

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How do arteries differ from veins in terms of pressure?

a) Arteries have higher pressure

c) Arteries and veins have equal pressure

b) Veins have higher pressure

d) Both have low pressure

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