Worksheet: Blood Vessels

In this worksheet, we will practice describing the structure and function of the major blood vessels in the human circulatory system.

Q1:

Which of the major blood vessels carries blood back into the heart?

  • AVeins
  • BCapillaries
  • CArteries

Q2:

Why do arteries have thick, muscular walls containing elastic fibers?

  • ATo prevent oxygen from being lost from the blood
  • BTo prevent the backflow of blood
  • CTo help them carry blood at low pressure
  • DTo allow the transport of substances to other cells
  • ETo help them carry blood at high pressure

Q3:

Which of the following correctly compares veins and arteries?

  • ABoth arteries and veins have thick muscular walls to carry blood at high pressure.
  • BBoth arteries and veins contain valves to prevent the backflow of blood.
  • CVeins have a muscular wall to carry blood at high pressure, and arteries have valves to prevent the backflow of blood.
  • DArteries have a muscular wall to carry blood at high pressure, and veins have valves to prevent the backflow of blood.

Q4:

Why is it important for capillaries to have thin, permeable walls?

  • ATo allow them to carry blood at a high pressure
  • BTo increase the rate of blood flow
  • CTo allow substances to diffuse into and out of cells
  • DTo prevent the backflow of blood in the vessels
  • ETo provide capillaries with the flexibility to move around cells

Q5:

What happens to the blood when it is taken to the lungs?

  • AIt becomes oxygenated.
  • BIt becomes deoxygenated.
  • CIt absorbs glucose.
  • DIt releases glucose.

Q6:

Why do veins often contain valves?

  • ATo keep blood moving against the concentration gradient
  • BTo keep blood moving at a high pressure
  • CTo ensure that blood is able to clot properly
  • DTo prevent the backflow of blood
  • ETo prevent blood from becoming deoxygenated

Q7:

Which of the major blood vessels carry blood from the heart to the lungs or the body?

  • AVeins
  • BCapillaries
  • CArteries

Q8:

What type of blood vessels surround and deliver blood to body cells, tissues, and alveoli?

  • AArteries
  • BCapillaries
  • CVeins

Q9:

Complete the table to correctly compare the structure of the three major blood vessels.

StructureVeinArteryCapillary
Width of WallThin1Single layer of cells
Size of Lumen2SmallVery small
Valves Present3No4
  • A1: Thick, 2: Small, 3: No, 4: No
  • B1: Thin, 2: Small, 3: Yes, 4: No
  • C1: Thick, 2: Large, 3: Yes, 4: No
  • D1: Thick, 2: Large, 3: No, 4: Yes
  • E1: Thin, 2: Large, 3: Yes, 4: Yes

Q10:

The diagram provided shows the structure of an artery. Which of the following best describes its structure?

  • AArteries have thick walls, large lumens, and valves.
  • BArteries have thick walls and small lumens and do not contain valves.
  • CArteries have a small lumen and a wall only one-cell thick.
  • DArteries have multiple valves inside a thick wall.
  • EArteries have thin walls and large lumens and do not contain valves.

Q11:

The diagram provided shows the structure of a vein. Which of the following best describes its structure?

  • AVeins contain valves inside thick, muscular walls.
  • BVeins have thin walls and a large lumen and contain valves.
  • CVeins have thin walls and a small lumen and do not contain valves.
  • DVeins have a wall that is one cell thick and contain valves.
  • EVeins have thick walls and a comparatively small lumen.

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