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What is the Circulatory system?
What does your circulatory system consist of?
What does your circulatory system do?
What does your heart do?
What are the blood vessels?
What are the three types of blood vessels?
What do arteries do?
Why is it that the walls of the arteries are so tough and elastic?
What do capillaries do?
What is the advantage of having one cell thick wall in capillaries?
What do veins do?
Why don't the veins have muscular walls like the arteries?
What do valves do?
What are bruises?
Describe Cardiac muscle.
Why is the circulatory system referred to as a double system?
What are the three main phases of a heartbeat?
What is Cholesterol? and what does it do to your artery?
What is angina?
What is the only organ in the body that is liquid in shape?
