Gaseous Exchange Flashcards
1
Q
where does gaseous exchange take place
A
the alveoli
2
Q
how does gaseous exchange occur
A
- breathing in
- air flows down trachea
- split at bronchi
- split into bronchioles
- brought into contact with alveoli (surrounded by capillaries)
- in the alveoli gaseous exchange occurs
3
Q
what is gaseous exchange
A
the exchange of oxygen from lungs into the blood stream
and
the exchange of carbon dioxide into the lungs from the blood stream
4
Q
key features of the alveoli that aid gaseous exchange
A
- plentiful blood supply
- large surface area
- moist
- thin walls
5
Q
what is diffusion
A
gases flow from high concentrations to low concentrations, even across a membrane
the primary means by which gaseous exchange occurs
