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[1] Introduction
[3] Origin of Chordates
[B] Cephalochordata
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Created by
RANDY RUEL
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Cards (5)
Basic body plan of cephalochordates are
dorsoventrally inverted
compared to earlier
deuterostomes
In
hemichordates
,
pharyngeal
slits open
dorsally
In chordates, they open
ventrally
Buccal cirri
Functions as a
sieve
,
blocks
large particles
Wheel organ
With
ciliated tracts
sweeping food into the
mouth
Hatschek's pit
Secretes mucus
to collect
food
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