-
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...
-
Strategic Air Command (
SAC) was a
United States Department of
Defense Specified Command and a
United States Air Force (USAF)
Major Command responsible...
- : alveoli, from
Latin alveolus, "little cavity"), also
known as an
air sac or
air space, is one of
millions of hollow,
distensible cup-shaped cavities...
- 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...
- Look up
sac or
SAC in Wiktionary, the free dictionary.
SAC or
Sac may
refer to:
Santa Ana College, California, US San
Antonio College, Texas, US St. Andrew's...
-
air sacs are
connected to the
airways of the
respiratory system, and the
pelican can keep its
air sacs inflated by
closing its glottis, but how
air sacs...
-
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...
-
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...
- a
series of
air sacs connected to the lungs. The use of
air sacs forms the
basis for the
three main
avian respiratory characteristics:
Air is able to flow...
-
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...
