Rev 1 Chapter 1

We inhale and exhale air through our ......

• stomach

• trachea

• windpipe

• nose

The exchange of gases takes place between the ........ in the lungs and the capillaries.

• arteries

• circulation

• alveoli

• veins

Our circulatory system is made up of blood, ......... and the heart.

• arteries

• blood vessels

• capillaries

• veins

The respiratory system which enables us to breathe brings oxygen from air to our .....

• lungs

• arteries

• blood

• veins

Our heart is always contracting and relaxing to ...... blood around the body.

• breathe

• waste

• pump

• follow

The amount of air in the lungs is ......... when breathing in.

• lack

• more

• less

• decreasing

Is covered with many blood vessels for gas exchange to take place

• alveoli

• trachea

• bronchi

• liver

Contracts and relaxes to allow air to move into and out of the lungs

• lungs

• trachea

• bronchi

• diaphragm

Allow air to travel between the nose and the lungs.

• lungs

• trachea

• bronchi

• nose

Carry blood rich in oxygen away from the heart.

• Veins

• Capillaries

• Arteries

• Bronchioles