How many chambers does the heart have?

• Two

• Four

• Six

• Eight

What are the upper chambers of the heart called?

• Veins

• Atria

• Ventricles

• Capillaries

What separates the left atrium from the right atrium?

• The vein

• The artery

• The septum

• The ventricle

What do arteries do?

• Fight off germs

• Carry blood away from the heart

• Connect arteries and veins

• Carry blood back to the heart

What is the main function of the circulatory system?

• To control body movements

• To protect the body from infections

• To deliver oxygen and nutrients to all parts of the body

• To help the body grow

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What is plasma?

• A yellowish fluid that carries nutrients and waste products

• A solid part of the blood

• A type of red blood cell

• A type of white blood cell

What do white blood cells do?

• Carry blood away from the heart

• Fight off germs

• Carry blood back to the heart

• Deliver oxygen

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What are platelets responsible for?

• Fighting off infections

• Carrying nutrients and waste products

• Delivering oxygen to cells

• Fixing veins and arteries when there is a cut

What makes up the central nervous system?

• The heart and the blood vessels

• The brain and the spinal cord

• The arteries and the veins

• The nerves of the body

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How long does it take for blood to travel through the entire circulatory system?

• 20 seconds

• 1 minute

• 5 minutes

• 30 seconds