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Bio Lab Chordata Facts!
Bio Lab Chordata Facts!
7
Zoology
Undergraduate 2
11/22/2017

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Term
Phylum Chordata
Tissue Layers?
Symmetry?
Development?
Skeleton?
Circulatory System?
Definition
Triploblastic
Bilateral
Deuterostomes
Endoskeleton
Closed
Term
5 Chordata Characteristics
Definition
Notochord
Dorsal, hollow nerve cord
Pharyngeal gill slits
Postanal tail
Endostyle (thyroid gland)
Term
Chordata Monophyletic
Definition
All descendants sharing a common evolutionary ancestor
Term
Homologous Structures
Definition
Inherited structures in different species that are similar because of their common ancestry
Term
Phylum Chordata
Subphylums
Classes
Definition
Subphylum Urochordata
Class Ascidiacea
Subphylum & Class Cephalochordata
Term
Subphylum Urochordata Characteristics
(5)
Definition
Notochord and nerve cord present only in larvae
Adults are sessile
Segmentation absent
Body enclosed in tunic
Entirely marine
Term
Subphylum Cephalochordata Characteristics
(4)
Definition
Notochord and nerve cord present throughout life
Segmentation present
Lance-shaped and w/o head
Entirely marine
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