Blood vessels interactive worksheet - Free Printable

Let's solve this worksheet step by step.

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1. Drag the name of the blood vessel to the appropriate diagram.

We are given three diagrams of blood vessels and need to match them with the correct names: Artery, Capillary, and Vein.

#### Understanding the diagrams:

- Artery: Typically has a thick wall (especially the tunica media) to withstand high pressure from the heart. The lumen (inner space) is smaller compared to veins.
- Vein: Thinner walls than arteries, larger lumen, and often has valves to prevent backflow.
- Capillary: Very thin-walled, tiny vessels where exchange occurs. They are usually shown as very narrow tubes with only one cell thick wall.

Looking at the diagrams:

1. Left image (thin, small, oval shape) → This is likely the CAPILLARY — very narrow, simple structure.
2. Middle image (thick wall, smaller lumen) → This is an ARTERY — thick muscular wall to handle high pressure.
3. Right image (large lumen, thinner wall) → This is a VEIN — wider lumen, thinner wall.

✔ So the matching is:
- Left diagram → CAPILLARY
- Middle diagram → ARTERY
- Right diagram → VEIN

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2. Complete the following sentences.

#### a. ALL arteries carry blood A___________ F___________ the heart.

- Arteries carry blood away from the heart.
- So:
A = Away
F = From

✔ Answer: Away From

#### b. ALL veins carry blood T___________ the heart.

- Veins carry blood toward the heart.
- So:
T = Towards

✔ Answer: Towards

#### c. Arteries transport O___________ blood except for the P___________ artery.

- Most arteries carry oxygenated blood.
- Exception: The pulmonary artery carries deoxygenated blood from the heart to the lungs.

So:
- O = Oxygenated
- P = Pulmonary

✔ Answer: Oxygenated, Pulmonary

#### d. Veins transport D___________ blood except for the P___________ vein.

- Most veins carry deoxygenated blood.
- Exception: The pulmonary vein carries oxygenated blood from the lungs to the heart.

So:
- D = Deoxygenated
- P = Pulmonary

✔ Answer: Deoxygenated, Pulmonary

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✔ Final Answers:

#### 1. Matching Diagrams:
- Left (thin) → CAPILLARY
- Middle (thick wall) → ARTERY
- Right (wide lumen) → VEIN

#### 2. Fill in the blanks:

a. ALL arteries carry blood Away From the heart.
b. ALL veins carry blood Towards the heart.
c. Arteries transport Oxygenated blood except for the Pulmonary artery.
d. Veins transport Deoxygenated blood except for the Pulmonary vein.

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