Respiratory and Circulatory System

Which gas is transported by the circulatory system in humans and is used by cells during respiration to release energy stored in food?

• carbon dioxide

• nitrogen

• hydrogen

• oxygen

What is the main organ of the circulatory system?

• small intestine

• bone

• lungs

• heart

Arteries carry oxygen rich blood away from the heart.

• True

• False

Veins carry oxygen poor blood back to the heart.

• False

• True

______________ are the smallest blood vessels.

• Arteries
• Veins
• Capillaries

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

What is included in the respiratory system?

Select ALL that apply.

• nose

• trachea

• lungs

• heart

What is included in the circulatory system?

Select ALL that apply.

• veins

• trachea

• heart

• arteries

What is the Circulatory System also known as?

• The heart
• Cardiovascular System
• Nervous System
• Aorta