Heart Structure

How many chambers does the heart have?

• 1
• 2
• 3
• 4

The arrow indicates the

• Right atrium
• Left ventricle
• Right ventricle
• Left atrium

The arrow indicates the 

• Left ventricle
• Pulmonary artery
• Right atrium
• Pulmonary veins

The arrow indicates the

• Right ventricle
• Aorta
• Right atrium
• Atrium

The arrow indicates the

• Right ventricle
• Pulmonary artery
• Left ventricle
• Right atrium

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

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

Deoxygenated blood

• travels through veins
• has little oxygen because the O₂ was delivered to cells
• all of these are true
• is indicated by blue on anatomical diagrams

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 circulatory system works with the ___________ system to provide our body with oxygen.

• respiratory
• digestive
• muscular
• skeletal

The main function of the circulatory system is 

• To give the body structure and support
• Excrete waste
• transport blood, nutrients, and gases throughout the body
• to transport messages from the body to the brain