Phylum Chordata
Phylum Chordata
Phylum Chordata
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<strong>Phylum</strong><br />
<strong>Chordata</strong><br />
Subphylum<br />
Cephalochordata<br />
A<br />
B<br />
C<br />
D<br />
B<br />
Dorsal region Note: fin ray (A), myomeres (B), dorsal<br />
hollow nerve cord (nerve tube) (C), notochord (D)