1855334
Descrição
Criado por graciehoffs
|
Criado por graciehoffs
quase 12 anos atrás
|
|
The process of breathing
- During breathing,
all the parts of the
thorax change
during inhilation
and exhilation
- DURING INHILATION
- These movements
increase the volume
of the chest and
cause a slight drop in
pressure in the
thorax
- Air then enters the lungs
- Air then enters the lungs
- External intercostal
muscles CONTRACT
pulling the ribs up
- Internal intercostals
RELAX
- Internal intercostals
RELAX
- Diaphragm CONTRACTS, pulling
down into a flatter shape
- These movements
increase the volume
of the chest and
cause a slight drop in
pressure in the
thorax
- DURING EXHILATION
- External
intercostal muscles
RELAX pulling the
ribs down and in
- Internal intercostals
CONTRACT
- Internal intercostals
CONTRACT
- Diaphragm RELAXES and returns
to its normal domed shape
- The chest volume
decreases and the
pressure in the
thorax is raised
slight above
atmospheric
pressure
- The difference in pressure
forces air out of the lungs
- The difference in pressure
forces air out of the lungs
- External
intercostal muscles
RELAX pulling the
ribs down and in
- There are two
movements that bring
about ventilation: the
movement of the ribs
and the diaphragm
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