The Heart

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

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 

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

Major artery at the top of the heart sends oxygenated blood from the left ventricle to the rest of the body.

• aorta
• pulmonary artery
• inferior vena cava

About how large is the human heart?

• the size of an onion
• the size of a fist
• 4.5 pounds

Your heart is an involuntary muscle that is always working.

• True

• False

The heart is made of which of the following types of muscles?

• Cardiac muscle

• Striated muscle

• Smooth muscle

• None of the above