Circulatory System

What is the main organ of the circulatory system?

• small intestine

• bone

• lungs

• heart

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How many types of blood vessels are in our body?

• 1
• 2
• 3
• 4

Arteries carry oxygen rich blood away from the heart.

• True

• False

Veins carry oxygen poor blood back to the heart.

• False

• True

______________ are the smallest blood vessels.

• Arteries
• Veins
• Capillaries

Which is a function of the cardiovascular system?

• to move water throughout the body
• to transport gases throughout the body 
• to eliminate waste from the body
• to provide structural support for the body 

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These cells, in the blood, carry oxygen and give the blood its color.

• white blood cells
• plasma
• platelets
• red blood cells

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Where in your body can you find blood vessels?

• around the heart
• in hands & feet
• in your head
• virtually everywhere

This type of vessel carries blood TO the heart:

• vein
• nerve
• muscle
• artery

When oxygen-rich blood is carried AWAY from the heart, it travels through an...

• artery
• neuron
• vein
• straw