human heart

What is the size of an adult’s heart?

• two fists together

• the size of a fist

• the size of a ball

• the size of an apple

How many chambers does the heart consist of?

• 2

• 3

• 4

• 6

What do the lungs provide the blood with?

• oxygen

• blood

• hydrogen

• carbon dioxide

What vessels carry the blood away from the heart?

• arteries

• veins

• an aorta

• capillaries

What vessels carry the blood back to the heart?

• arteries

• veins

• an aorta

• capillaries

What are the thinnest blood vessels called?

• arteries

• veins

• capillaries

• an aorta

What is biggest artery in a human body?

• arteries

• veins

• capillaries

• an aorta

How much blood if there in an adult human body?

• 3 liters

• 5 liters

• 10 liters

• 20 liters

How many times does a human heart beat a day?

• 100 times

• 1000 times

• 100,000 times

• 1,000,000 times

What is the total length of blood vessels in a human body?

• 6 miles

• 60 miles

• 6,000 miles

• 60,000 miles