The Respiratory System Flashcards
What do the tubes take in?
air from surroundings and carry it to small air sacs where it can diffuse into the blood
What are the small air sacs called?
Alveoli
The lungs are in the…
Upper part of body (thorax)
What are the lungs protected by?
Rib cage
How are the lungs separated from the lower part of the body (abdomen)?
Muscular diaphragm
Where does air pass into?
Trachea
What is at the top of the trachea?
Larynx - which contains vocal chords
When do the vocal chords make sound?
When air passes through them
What does the trachea have surrounding it?
Rings of cartilage which keep trachea open
What does the trachea branch into?
2 bronchi - 1 bronchus goes into each lung
What branches off the bronchi?
Smaller tubes called bronchioles
What is each lung covered in?
Thin smooth membrane
What is also lined with a thin small membrane?
Rib cage
What are the membranes
Called that lime the rib age and lungs?
Pleural membranes
What is the trachea?
Wind pipe
What are bronchioles?
Small tubes that carry air into and out of parts of lungs
What is a Bronchus?
A branch of the trachea - 1 goes into each lung
What is between the two membranes?
Pleural cavity containing a liquid - pleural fluid
What does the pleural fluid do?
Lubricates inside of lungs as they inflate and deflate so lungs don’t rub against rib cage
What does the respiratory system consist of?
Number of tubes
What can we detect carbon dioxide with?
Limewater
What colour does limewater change to in the presence of carbon dioxide?
Clear - milky white
What colour does hydrogen carbonate turn in the presence of carbon dioxide?
Red/orange - yellow
What colour does hydrogen carbonate turn when carbon dioxide is removed?
Red/orange - purple
Why is it better to breathe through your nose than your mouth?
Because the hairs in your nose stop small particles coming into your lungs
Why are the ribs so important?
They protect lungs from any damageable impact
What are the small hairs called cilia lining the tubes of Bronchioles for?
Move mucus up airways to mouth where it is then swallowed
