P5 Respiratory System

Multiple Choice

What is the purpose of the respiratory system?

• takes in oxygen and release carbon dioxide

• takes in carbon dioxide and releases oxygen

• takes in nitrogen and releases carbon dioxide

• takes in oxygen and releases nitrogen

Multiple Choice

What do humans need to breathe in from the air?

• oxygen

• nitrogen

• carbon dioxide

• ammonia

Multiple Choice

What is oxygen needed for?

• energy releasing chemical reactions

• to make glucose

• to take in sunlight

• none of the above

Multiple Choice

This area warms, moisturizes, and filters air before going to the lungs. What is it?

• nasal cavity

• nose

• mouth

• trachea (windpipe)

Multiple Choice

Your windpipe is also called the...

• trachea

• larynx

• pharynx

• esophagus

Multiple Choice

What word best describes the function of the trachea (windpipe)?

• Pumping station

• Entrance point

• Muscle

• Passageway

Multiple Choice

The elastic sponge-like organs are where gas exchange occurs.

• lungs

• alveoli

• ravioli

• trachea

Multiple Choice

When you breathe, your lungs take in ___ and remove ___. 

• air/oxygen
• oxygen/carbon dioxide 
• carbon dioxide/waste 
• waste/air 

Multiple Choice

Where does the transfer of oxygen into the bloodstream take place?

• In the heart

• In the trachea (windpipe)

• In the alveoli (air sacs)

• In the nasal passages

Multiple Choice

The alveoli (air sacs) are covered with _________ to help with gas exchange

• bronchi
• capillaries

• oxygen
• alveoli

Multiple Choice

The walls of the alveoli and capillaries are permeable. What does this mean?

• Substances can pass through them.

• They are made of muscle.

• They are located throughout the body.

• They are made of bone.

Multiple Choice

The walls of the alveoli and capillaries are ___________ to allow for efficient exchange of gases.

• only one-cell thick

• extremely thick

• transparent

Open Ended

Alveoli become enlarged and damaged with reduced surface area in heavy smokers. The condition is called emphysema.

*a large surface area is ideal for efficient gas exchange

​ Alveoli become enlarged and damaged with reduced surface area in heavy smokers. The condition is called emphysema.

*a large surface area is ideal for efficient gas exchange

Multiple Choice

What is the function of the diaphragm?

• the muscle that contracts and relaxes when you breathe

• the muscle that regulates your heart beat

• no function

Multiple Choice

When the diaphragm contracts and moves down, the lungs are...

• expanding with air
• shrinking - pushing air out

Multiple Choice

When the diapragm relaxes and moves back up, the lungs are...

• expanding with air
• shrinking - pushing air out

Multiple Choice

What happens when your diaphragm relaxes and moves upward?

• Your lungs deflate and you breathe out.

• Your lungs inflate and you breathe in.

• Your alveoli transfer oxygen to your bloodstream.

• Your bloodstream transfers carbon dioxide to your alveoli.

We now know that…

• Respiratory system includes nose (and nasal cavity),
  windpipe (trachea), bronchi (air tubes), lungs, diaphragm, and the muscles between the ribs.

• Gas exchange is the diffusion of gases into and out of the body

• Oxygen diffuses from the air sacs into the blood. Carbon dioxide diffuses the other way. 

• Thin walls of air sacs help gas exchange to take place quickly.

How can we apply what we have learnt in our daily lives?

​​The Circulatory System

Blood carries things like oxygen and nutrients to each cell in the body. The heart pumps blood through the body through a system of tubes called blood vessels.

​​The Circulatory System

Arteries are a type of blood vessel that carries oxygen-rich blood away from the heart. Veins are another type of blood vessel which carries oxygen-poor blood back to the heart.