-
Air sacs are
spaces within an
organism where there is the
constant presence of
air.
Among modern animals,
birds possess the most
air sacs (9–11), with...
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Strategic Air Command (
SAC) was a
United States Department of
Defense Specified Command and a
United States Air Force (USAF)
Major Command responsible...
- (pl. alveoli; from
Latin alveolus 'little cavity'), also
called an
air sac or
air space, is one of
millions of hollow,
distensible cup-shaped cavities...
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Air sac generally refers to an
organ or
portion of an
organ containing air within an animal's
respiratory system. It may
refer specifically to: Pulmonary...
- the rear the
posterior thoracic air sac, in the
middle the
anterior thoracic air sac and in
front the
clavicular air sac, in that
order gradually diminishing...
- Airsacculitis, also
known as
air sacculitis, aerosacculitis,
air sac disease,
air sac infection,
air sac syndrome and
simply sac disease, is a
common inflammatory...
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constructed for
their size and
contained openings for
air sacs (pneumatization). Such
air sacs were at the time
known only in
birds and pterosaurs, and...
-
millions of
small air sacs; in
mammals and reptiles,
these are
called alveoli, and in birds, they are
known as atria.
These microscopic air sacs have a very...
-
respiratory system had
efficient unidirectional "flow-through"
breathing using air sacs,
which hollowed out
their bones to an
extreme extent.
Pterosaurs spanned...
-
large gliding and
soaring birds tend to have the most.
Respiratory air sacs often form
air pockets within the semi-hollow
bones of the bird's skeleton. The...
