Systems in the Human
Body
, The Respiratory system
Grade 11
Compiled by J Gibson Presented by J Gibson & M Vermeulen
, Terminology
INHALATION EXHALATIO
N
BREATHING
The mechanical BREATHING GAS EXCHANGE
process whereby air
The exchange of
moves in and out of
oxygen (O2) and
the lungs
carbon dioxide
(CO2) across a
gaseous exchange
WHAT HAPPENS
surface.
TO THE O2?
WHERE DID THE
CO2 COME
FROM?
GAS EXCHANGE
, GRADE 10 REVISION – GAS EXCHANGE
In the respiratory system it occurs:
• at the alveoli
• at all metabolically active cells
Happens through diffusion:
Passive movement of substances
from an area with a high
concentration
to an area with a low
concentration.
Body
, The Respiratory system
Grade 11
Compiled by J Gibson Presented by J Gibson & M Vermeulen
, Terminology
INHALATION EXHALATIO
N
BREATHING
The mechanical BREATHING GAS EXCHANGE
process whereby air
The exchange of
moves in and out of
oxygen (O2) and
the lungs
carbon dioxide
(CO2) across a
gaseous exchange
WHAT HAPPENS
surface.
TO THE O2?
WHERE DID THE
CO2 COME
FROM?
GAS EXCHANGE
, GRADE 10 REVISION – GAS EXCHANGE
In the respiratory system it occurs:
• at the alveoli
• at all metabolically active cells
Happens through diffusion:
Passive movement of substances
from an area with a high
concentration
to an area with a low
concentration.
