Cardiovascular System: Heart Structure

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

As the right ventricle contracts, the blood flows into the 

• Heart
• Pulmonary arteries 
• Atrium
• Ventricle 

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

The pointed, inferior portion of the heart, known as the ________ rests on the diaphragm and is oriented towards the left hip.

• base
• mediastinum
• apex
• pericardium

The valves between the atria and ventricles are known as the ________ valves.

• atrioventricular
• aortic
• semilunar
• pulmonary

Which layer of the heart contains a lubricating fluid that reduces friction as the heart beats?

• Pericardium
• Endocardium
• Myocardium

Identify the structure the arrow is pointing to

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

Identify the structure the arrow is pointing to

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