Tag Archives | Difference

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
Read More

Difference between Protochordates and Higher Chordates

The upcoming discussion will update you about the difference between protochordates and higher chordates. Difference # Protochordates: 1. Notochord persists throughout life. 2. No cranium or vertebral column. 3. Atrium, the space in between pharynx and body wall, is present. 4. Endostyle is present except hemichordates. It is the precursor of thyroid gland of high­er vertebrates. 5. Absence of neural [...]

By |2016-07-22T08:09:53+00:00July 22, 2016|Phylum Chordata|Comments Off on Difference between Protochordates and Higher Chordates
Read More

Ciliary Mode between Branchiostoma, Ascidia and Balanoglossus

Let us learn about the comparison of ciliary mode between branchiostoma, ascidia and balanoglossus. Comparison # Balanoglossus: 1. Internal food-collection, i.e., food is collected inside the body. 2. Microphages. 3. Wheel organ produces a flow of water-current which is drawn into the mouth. 4. Velum with velar tenta­cles control the entry of water-current into mouth. 5. The feeding current follows [...]

By |2016-07-22T08:09:53+00:00July 22, 2016|Phylum Chordata|Comments Off on Ciliary Mode between Branchiostoma, Ascidia and Balanoglossus
Read More
Go to Top