What is the circulatory system?

What are the tasks of circulatory system?

What does your circulatory system consist of?

Why is your heart referred to as the "engine" of the circulatory system?

Where does the blood flow through?

What are the three types of blood vessels?

What do your arteries do?

What make the capillaries special in comparison to other blood vessels?

What are veins?

How is blood pushed back up to the heart through the veins?

What do the valves in veins do?

What is a thrombus?

What is the fatal condition that causes a thrombus to form in a deep vein in your leg which can block your arteries?

What causes bruises?

True or False: Your heart is about the size of your fist.

Where is the heart situated?

What is heart made out of?

How does cardiac muscle never get tired?

Why is the circulatory system also known as the double system?

What is the difference between deoxygenated and oxygenated blood?

How many chambers does the heart have?

What are the three main stages of a heart beat?

What causes heart disease?

What is plaque?

What is angina?