Which number is the vena cava?

• 1
• 2
• 3
• 8

Which number is the pulmonary artery?

• 4
• 5
• 6
• 8

What does letter D represent?

• aorta
• left atrium
• left ventricle
• right atrium

What carries the oxygenated blood from the lungs to the left atrium of the heart?

• vena cava 
• aorta
• pulmonary vein
• pulmonary artery

The most muscular chamber of the heart is the 

• left ventricle
• left atrium
• right atrium
• right ventricle

As the right ventricle contracts, the blood flows into the 

• Heart
• Pulmonary arteries 
• Atrium
• Ventricle 

The right side of the heart contains...

• Oxygenated Blood

• De-oxygenated Blood

• Both Oxygenated and De-oxygenated Blood

• Water

Which blood vessels has a thicker wall?

• Arteries

• Veins

• Neither both have the same thickness

• I'm not sure

The first chamber that blood enters in the Heart is...

• The Atrium

• The Ventricle

• The Septum

• The Aorta

What is the function of valves in the heart?

• To keep the heart pumping

• To create pressure

• To prevent back flow of blood

• To keep the blood warm