The circulatory system – Did you know?

The video explains that blood vessels transport substances throughout the body. It highlights an interesting fact that if all the blood vessels in the human body were laid end to end, they would stretch long enough to circle the Earth two and a half times. This emphasizes the extensive network of blood vessels present in the human body.

What is the primary function of blood vessels in the human body?

• To transport substances

• To produce blood cells

• To regulate body temperature

• To store nutrients

Approximately how many kilometers of blood vessels are there in the human body?

• 100,000 kilometers

• 10,000 kilometers

• 1000 kilometers

• 100 kilometers

If laid end to end, how many times could the blood vessels in the human body circle the Earth?

• Two and a half times

• Once

• Three times

• Twice