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 multi-ciliated cells
8. Example:
Annelida, Echiura, Pogonophora, Sipuncula, Arthropoda, Mollusca, Nemertea except crabs, insects and squids.
Difference # Deuterostomes:
1. Cleavage:
Radial, indeterminate or regulative
2. Blastopore:
Mouth does not form from blastopore
3. Coelom:
Enterocoelic (evagination of pouches from the wall of archenteron)
4. Mesoderm:
From gut wall, in-folding
5. Arrangement of coelomic cavities:
Generally in three pairs
6. Larval type:
Dipleurula
7. Larval ciliary bands:
Simple cilia and single cilium in each cell
8. Example:
Echinodermata, Hemichordata and Chordata except ascidiaceans.