Page 230 - A Definitive Reply to Evolutionist Propagand‪a

Trachea (windpipe)
BREATHING
Air sacs at base Up to a fifth of a bird's
of neck body volume is taken
up by air sacs which
are connected to the
lungs. The air sacs
Syrinx (a cham- even extend into the
ber which pro-
duces a bird's wing bones.
song)

Lungs

Air sacs in
Air sacs abdomen
within chest

Thanks to special air sacs all
along the passages betwen them,
air always flows in one direction
through the avian lung. In this
way, birds are able to take in air
nonstop. This satisfies their high
energy requirements.
The avian respiratory system is a
marvel of design, specially created
to meet the bird's need for high
levels of oxygen during flight.

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