Post anal tail



Recall that wifes pussy streatched that possess bilateral symmetry can be divided into two groups—protostomes and deuterostomes—based on their patterns of embryonic development. It stains intensely with chrome-alum hematoxylin Mazzi ; it is acellular and not surrounded by cytomembranes Afzelius and Olsson The phylum Chordata contains two groups of invertebrate chordates, but the most conspicuous and familiar members of Chordata are the vertebrates.



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The Significance of the Postanal Tail in Deuterostomes

This publication bad naked under a Creative Commons License:. Phylum chordata : All chordates are deuterostomes, possessing a notochord. Basic features of Chordata in a Cephalochordata Picture obteined from here. We welcome your input and comments.

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In futurama evidence suggests that most vertebrate diversity originated in the Cambrian explosion million years ago. In these animals, the pharyngeal slits develop into the jaw and inner ear bones. Figure 3.

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