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 [...]
In this article we will discuss about Ascidia:- 1. Habit and Habitat of Ascidia 2. External Structures of Ascidia 3. Body Wall 4. Coelom 5. Locomotion 6. Digestive and Respiratory Systems 7. Circulatory System 8. Excretory System 9. Nervous System 10. Reproductive System 11. Development and Life-History 12. Zoological Importance of Tadpole Larva 13. Classification. Contents: Habit and Habitat of [...]
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 [...]