Circulatory System

Front

What is the main organ of the circulatory system?

Back

The heart is the main organ of the circulatory system.

Front

What do red blood cells do?

Back

Red blood cells carry oxygen from the lungs to the body cells and transport carbon dioxide from the cells back to the lungs.

Front

What is the job of the heart?

Back

The job of the heart is to pump blood around the body.

Front

Do veins carry oxygen-poor blood back to the heart?

Back

True, veins carry oxygen-poor blood back to the heart.

Front

What function does the heart perform?

Back

The heart is a pump that moves blood; arteries and veins are the pipes where blood flows.

Front

What are arteries?

Back

Arteries are blood vessels that carry oxygen-rich blood away from the heart.

Front

What is the role of capillaries?

Back

Capillaries are tiny blood vessels where the exchange of oxygen, carbon dioxide, nutrients, and waste occurs.

Front

What is blood made of?

Back

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

Front

What do white blood cells do?

Back

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

Front

What is plasma?

Back

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