Science & Math | Nature & Ecology

Encyclopaedia Of Chordate Zoology

by Veena Kumari

2021-02-11 17:14:24

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All beings of the phylum Chordata have branchial clefts in the pharynx, notochord and dorsal neural tube. In chordates the nervous system is dorsal and highly cephalized while in most invertebrates the nervous system is ganglial and ventral. In verte... Read more

All beings of the phylum Chordata have branchial clefts in the pharynx, notochord and dorsal neural tube. In chordates the nervous system is dorsal and highly cephalized while in most invertebrates the nervous system is ganglial and ventral. In vertebrates the notochord disappears and gives birth to the spinal column (vertebral column). In protochordates the notochord remains for the rest of the life. The tubular and dorsal nervous system of chordates is related to the cephalization in these animals and to bilateral symmetry. With rare exceptions, fishes, amphibians, reptiles and monotreme mammals are oviparous, egg-laying (embryos develop within eggs and outside the mother’s body) and marsupial and placental mammals are viviparous (embryos develop inside the mother’s body, feeding from her). This text is a one-stop resource for all researchers, teachers, and students involved in this crucial area of study.

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Book Details

Publication date August 12, 2018
LanguageEnglish
ISBN9ffcb785-5284-468d-82b3-71cf2b352b57
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Veena Kumari
Author
Veena Kumari is Assistant Professor in the Department of Zoology at Deoghar College, Deoghar, a constituent unit of SKM University, Dumka (Jharkhand). She is a prolific author and has three books publ...

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