Human Circulatory System – Practice Questions (Grade 6)

Front

What is the main function of the circulatory system?

Back

To transport blood, oxygen, and nutrients

Front

Which organ pumps blood throughout the body?

Back

Heart

Front

Arteries carry blood...

Back

from the heart to the body

Front

Which type of blood vessel connects arteries and veins?

Back

Capillaries

Front

Which part of the heart receives deoxygenated blood?

Back

Right atrium

Front

What component of blood is responsible for transporting oxygen?

Back

Red blood cells

Front

What is the largest artery in the human body?

Back

Aorta

Front

What is the name of the red liquid that flows in the circulatory system?

Back

Blood

Front

The heart has ______ chambers.

Back

four

Front

The smallest blood vessels are called ______.

Back

capillaries