Phylum Chordata - FSUbsc2011l/F Spr 08 04 Chordata.pdf · Phylum. Chordata. 3 Subphyla. Subphylum ....
Transcript of Phylum Chordata - FSUbsc2011l/F Spr 08 04 Chordata.pdf · Phylum. Chordata. 3 Subphyla. Subphylum ....
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Phylum
Chordata
3 Subphyla
Subphylum UrochordataSubphylum CephalochordataSubphylum Vertebrata
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Subphylum
Urochordata
AdultHas only 1 Chordate characteristic:
Pharyngeal gill bars have become a filter feeding basket
LarvaHas all 4 Chordate characteristics
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Subphylum
UrochordataTunicate tadpole larvae
Note 4 chordate characteristics:
1. Dorsal hollow nerve cord
2. Notochord3. Pharyngeal gill
slits or bars4. Post-anal tail
(A)
A
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Post anal tail
Metapleural FoldsPharyngeal gill bars & slits
Notochord
AnusAtriopore
Cirri
Nerve cord
Subphylum
Cephalochordata
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Dorsal region Note: fin ray (A), myomeres (B), dorsal hollow nerve cord (nerve tube) (C), notochord (D)
D
A
B
CB
Phylum
ChordataSubphylum
Cephalochordata
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Anterior region Note: (D) pharynx, (E) endostyle –(produces mucus to help catch food in between the gill bars - Yummy!) (MF) - Meta pleural folds (A) atrium
O
OB
B
B
B
B
C
C
C
CD
E MFMF
A
Ovary P. gill bar
P gill slit
Endostyl e
Phylum
ChordataSubphylum
Cephalochordata
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Phylum
ChordataSubphylum Vertebrata
7 Classes -Agnatha Hagfish & LampreysChondrichthyes SharksOsteichthyes Bony fishAmphibia Frogs & SalamandersReptilia Turtles & CrocsAves BirdsMammalia Your lab partner!
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Phylum ChordataSubphylum Vertebrata
TYPES of SKELETON
Cartilaginous Skeleton (2 classes)AgnathaChondrichthyes
Bony Skeleton (5 classes) Osteichthyes ‘RAAMO’AmphibiaReptilia AvesMammalia
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Phylum ChordataSubphylum Vertebrata
NUMBER OF HEART CHAMBERS
AgnathaChondrichthyesOsteichthyes
AmphibiaReptilia (except crocs)
CrocsAvesMammalia
2
3
4
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Phylum ChordataSubphylum Vertebrata
WHO HAS AN AMNIOTIC EGG?
Amniotes – ‘RAM’ReptiliaAvesMammalia
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Always take the shortest route……If you can’t remember all the classes that are ectothermic… just remember those that aren’t!
Endothermic Aves Mammalia
Endothermy – ability to maintain body temperature by internal metabolic processes
Phylum ChordataSubphylum Vertebrata
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Don’t forget the dissections…….and all those special little structures