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ADAPTATIONS & PHYSIOLOGY OF
CETACEAHow they are successful in the
deep, blue sea!!
Adaptations for diving underwater:
Involves circulatory & respiratory systems Problems: depth & length of time
underwater Before diving whale inhales large breath &
blows it out Oxygen is absorbed rapidly due to large lungs &
many red blood cells (RBC) Oxygen moves into myoglobin & is stored.
Breathing Continuation Exhale: lungs & ribcage collapse which
reduces pressure difference No nitrogen is absorbed During dive: blood flow is reduced to body
except brain & heart Slower metabolic rate
Whale re-surfaces Blowout spout of vapor & nitrogen gas Inhale and exhale process repeats Whale does not experience decompression
sickness, “the bends” like humans do.
Cetacea Intelligence Have large brains Brain is convoluted and thick Can learn behaviors: defense,
entertainment Can use previous learning & apply to new
things