Circulatory system

Front

What is the main function of the human heart?

Back

The human heart pumps blood throughout the body, supplying oxygen, nutrients, and hormones, and removing carbon dioxide and other wastes.

Front

How big is the human heart?

Back

The human heart is about the size of a fist.

Front

What do all living things do?

Back

All living things grow and develop, reproduce, respond to their environment, use energy, and get rid of waste.

Front

Which blood vessels carry blood away from the heart?

Back

Arteries carry blood away from the heart.

Front

Do white blood cells attack viruses?

Back

Yes, white blood cells attack viruses.

Front

What is blood made of?

Back

Blood is made of red blood cells, white blood cells, platelets, and plasma.

Front

What is the role of red blood cells?

Back

Red blood cells carry oxygen from the lungs to the rest of the body.

Front

What is the role of white blood cells?

Back

White blood cells help fight infections and protect the body from diseases.

Front

What do veins do?

Back

Veins carry blood back to the heart.

Front

What is plasma?

Back

Plasma is the liquid part of blood that carries cells, nutrients, and waste.