What other body part can you use to estimate the size of your heart?

• Your foot

• Your brain

• Your fist

• Your face

What part of the heart plays a key role in lubricating the heart so that it doesn't overheat itself or surrounding tissues with friction?

• fibrous pericardium

• serous pericardium

• endocardium

• serious pericardium

How many chambers does the heart have?

• 1
• 2
• 3
• 4

These structures carry deoxygenated blood to the heart.

• Arteries
• Veins
• Capillaries
• Vena Cava

These structures carry blood away from the heart.

• Blood cells
• Veins
• Capillaries
• Arteries

This chamber of the heart that RECEIVES blood returning from the body

• Right Atrium
• Right Ventricle
• Left Atrium
• Left Ventricle

The number of valves in the heart is

• 1
• 2
• 3
• 4

The major blood vessel that carries oxygenated blood out of the heart is the

• left atrium
• right atrium
• aorta
• vena cava

The purpose of heart valves is to 

• set the pace at which the heart beats
• prevent blood from flowing backward
• oxygenate the blood as it passes through the valve
• add minerals to the blood

The thickest layer of the heart is the

• endocardium

• myocardium

• serous pericardium

• fibrous pericardium