*presence of eal gilnotochord, dorsal hollow nerve cord and paired pharyngeal gill slit are the characterised feature of chotdata.
*habitat- found everywhere
*symmetry- bilateral
*body form- triploblastic
*body cavity- coetomate
*level of organisation-organ system level
*circulatory system- closed type
* phylum chordata is divided into three subphylua-
*protochordates are exclusively marine.
*in urochordata the notochord is present only in larval tail.
*in cephalochordata , notochord extends from head to tail region, throughout life
*e.g.-Urochordata-Ascidia, Salpa,Doliolum
Cephalochordata-Branchiostoma
*in vertibrata the notochord is replaced by a cartilaginous or bony vertebral column. thus all vertibrates are chordates but all chordates are not vertebrates.
*habitat- found everywhere
*symmetry- bilateral
*body form- triploblastic
*body cavity- coetomate
*level of organisation-organ system level
*circulatory system- closed type
* phylum chordata is divided into three subphylua-
- Urochordata /Tunicata
- Cephalochordata
- Vertebrata
*protochordates are exclusively marine.
*in urochordata the notochord is present only in larval tail.
*in cephalochordata , notochord extends from head to tail region, throughout life
*e.g.-Urochordata-Ascidia, Salpa,Doliolum
Cephalochordata-Branchiostoma
*in vertibrata the notochord is replaced by a cartilaginous or bony vertebral column. thus all vertibrates are chordates but all chordates are not vertebrates.
ASCIDIA
BRANCHIOSTOMA
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