Gaseous Exchange in Humans

Which of these is an adaptation alveoli have for efficient gas exchange?

• thick walls

• thin walls

• small surface area

The diagram shows the structure of the human gas exchange system. Name organ P.

• alveolus

• trachea

• bronchus

• diaphragm

How does an increase in lung volume lead to air entering the lungs?

• Produces higher pressure in the lungs

• Produces lower pressure in the lungs

The two main branches from the trachea are ___________ (one to each lung)?

• Bronchi

• Alveoli

• Capillaries

• Bronchioles

The air sacs that are covered with capillaries where gas exchange takes place is _________?

• Bronchi
• Trachea 
• Oxygen
• Alveoli

Tags

NGSS.HS-LS2-5

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

• Air/Oxygen
• Oxygen/Carbon Dioxide 
• Carbon Dioxide/Waste 
• Waste/air 

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

• expanding with air

• deflating - pushing air out

The ribs move down and in during.......

• inhalation

• exhalation

The external intercostal muscles contract during......

• inhalation

• exhalation

Thin-walled vessels that allow for the exchange of O_{2 &} CO₂, between blood cells or air sacs in the lungs

• Arteries

• Veins

• Capillaries