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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

d) Arterioles

a) Arteries

15

What is the function of capillaries?

a) To carry blood away from the heart

b) To exchange nutrients and oxygen with tissues

d) To regulate blood pressure

c) To transport blood back to the heart

15

What is the main characteristic of arteries?

b) Low pressure

c) Single-cell thick walls

d) Thick, elastic walls

a) Thin walls

15

Why do arteries have thick layers of muscle tissue?

c) To stretch and recoil

d) To bear high pressures

b) To prevent blood clotting

a) To maintain low pressure

15

What is the structure of capillary walls?

d) Multilayered

c) Elastic and stretchy

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

a) Thick and muscular

15

What is the function of veins?

b) To transport blood away from the heart

c) To transport blood back to the heart

d) To regulate blood pressure

a) To exchange substances with cells

15

Why do veins have valves?

d) To prevent backward flow of blood

a) To maintain high pressure

c) To control the flow of oxygen

b) To prevent blood clotting

15

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

b) Low pressure

d) Elasticity

a) High pressure

c) Permeability

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

c) Larger

a) Smaller

b) Equal

d) Variable

15

Which blood vessels have the largest lumens?

a) Arteries

b) Capillaries

d) Arterioles

c) Veins

15

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

a) To regulate blood pressure

d) To carry blood away from the heart

c) To store excess blood

b) To exchange gases and nutrients with tissues

15

Which blood vessels have the thinnest walls?

b) Capillaries

a) Arteries

d) Venules

c) Veins

15

What is the purpose of elastic fibers in arteries?

a) To regulate blood flow

d) To prevent blood clotting

b) To maintain low pressure

c) To stretch and recoil

15

What role do veins play in the circulatory system?

a) They carry blood away from the heart

d) They regulate body temperature

c) They transport blood back to the heart

b) They exchange gases with tissues

15

What characteristic distinguishes capillaries from other blood vessels?

d) Elasticity

b) Permeability - allowing liquids or gases to pass through

a) Thick walls

c) High pressure

15

How do arteries differ from veins in terms of pressure?

a) Arteries have higher pressure

b) Veins have higher pressure

c) Arteries and veins have equal pressure

d) Both have low pressure

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