Which number is the vena cava?

• 1
• 2
• 3
• 8

The two chambers of the heart which receive blood are known as the _________

• atria
• ventricles
• systemics
• pulmonic

Which valve is letter X?

• aortic
• bicuspid
• tricuspid
• pulmonary

Freshly oxygenated blood is delivered to the _____________ and then it passes into the  __________ to be pumped to the entire body.

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

What is the most muscular chamber of the heart?

• left ventricle

• left atrium

• right atrium

• right ventricle

As the right ventricle contracts, the blood flows into the 

• Heart
• Pulmonary arteries 
• Atrium
• Ventricle 

Which letter is the aortic valve?

• A
• B
• E
• F

Valve that blood is forced through from right ventricle into pulmonary arteries.

• pulmonary semi lunar valve

• aortic valve

• mitral valve

In the walls of the heart, there are two thin layers around a thick layer of muscle called the

• epithelial tissue.

• pericardium.

• connective tissue.

• myocardium.

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