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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

a) To carry blood away from the heart

b) To exchange nutrients and oxygen with tissues

d) To regulate blood pressure

15

What is the main characteristic of arteries?

a) Thin walls

c) Single-cell thick walls

d) Thick, elastic walls

b) Low pressure

15

Why do arteries have thick layers of muscle tissue?

c) To stretch and recoil

b) To prevent blood clotting

a) To maintain low pressure

d) To bear high pressures

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What is the structure of capillary walls?

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

c) Elastic and stretchy

d) Multilayered

a) Thick and muscular

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What is the function of veins?

a) To exchange substances with cells

b) To transport blood away from the heart

c) To transport blood back to the heart

d) To regulate blood pressure

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Why do veins have valves?

c) To control the flow of oxygen

d) To prevent backward flow of blood

b) To prevent blood clotting

a) To maintain high pressure

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

b) Low pressure

a) High pressure

c) Permeability

d) Elasticity

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

b) Equal

a) Smaller

c) Larger

d) Variable

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Which blood vessels have the largest lumens?

d) Arterioles

a) Arteries

c) Veins

b) Capillaries

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

c) To store excess blood

b) To exchange gases and nutrients with tissues

a) To regulate blood pressure

d) To carry blood away from the heart

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Which blood vessels have the thinnest walls?

c) Veins

d) Venules

a) Arteries

b) Capillaries

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What is the purpose of elastic fibers in arteries?

b) To maintain low pressure

a) To regulate blood flow

c) To stretch and recoil

d) To prevent blood clotting

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What role do veins play in the circulatory system?

d) They regulate body temperature

a) They carry blood away from the heart

c) They transport blood back to the heart

b) They exchange gases with tissues

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What characteristic distinguishes capillaries from other blood vessels?

c) High pressure

a) Thick walls

b) Permeability - allowing liquids or gases to pass through

d) Elasticity

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How do arteries differ from veins in terms of pressure?

b) Veins have higher pressure

a) Arteries have higher pressure

d) Both have low pressure

c) Arteries and veins have equal pressure

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