Tag Archives | Protostomes and Deuterostomes

Difference between Protostomes and Deuterostomes | Phylum Chordata

The upcoming discussion will update you about the difference between protostomes and deuterostomes. Difference # Protostomes:    1. Cleavage: Spiral, determinate or mosaic 2. Blastopore: Mouth develops from blastopore 3. Coelom: Schizocoelic (splitting of mesodermal) 4. Mesoderm: From 4d cell, proliferation 5. Arrangement of coelomic cavities: Variable in number 6. Larval type: Trochophore 7. Larval ciliary bands: Compound cilia from 1 [...]

By |2016-07-22T08:09:53+00:00July 22, 2016|Phylum Chordata|Comments Off on Difference between Protostomes and Deuterostomes | Phylum Chordata
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Embryological Characteristics of Protostomes and Deuterostomes

The upcoming discussion will update you about the difference between embryological characteristics of Protostomes and Deuterostomes. Difference # Protostomes: 1. Cleavage of Protostomes are spiral, determinate or mosaic. Bilateral-mosaic cleavage of some protostomes (e.g., nematodes). 2. In Protostomes, the blastopore either becomes the mouth, the anus forms a new structure (e.g., most of molluscs) or the blastopore gives rise to [...]

By |2016-05-27T11:36:15+00:00May 27, 2016|Animals|Comments Off on Embryological Characteristics of Protostomes and Deuterostomes
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Characteristics of Protostomes and Deuterostomes

In this article we will discuss about the development characteristics of protostomes and deuterostomes. Protostomes: Developmental Characteristics: 1. Pattern of embryonic cleavage: Spiral cleavage pattern; the spiral cleavage is masked at the 6th cleavages (64-cell stage), e.g., Sipuncula, Echiura, Annelida, Pogonophora, Mollusca and some groups of Arthropoda (e.g., Myriapoda, Crustacea and Insecta except Chelicerata). 2. Fate of embryonic blastomeres: Determinate [...]

By |2016-05-27T11:31:31+00:00May 27, 2016|Metazoa|Comments Off on Characteristics of Protostomes and Deuterostomes
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