In this article we will discuss about Trochophore Larva:- 1. Historical Retrospect of Trochophore Larva 2. Structures of the Trochophore Larva 3. Biology and Metamorphosis 4. Structures 5. Affinities 6. Phylogenetic Significance. Historical Retrospect of Trochophore Larva: 1. Loven (1840), a Swedish naturalist, was the first man who discovered trochophore larva. Since then the larva was known as Loven's larva. [...]
In this article we will discuss about Leech:- 1. Habit and Habitat of Leech 2. External Structures of Leech 3. Body Wall 4. Coelom 5. Locomotion 6. Digestive System 7. Respiratory System 8. Circulatory System 9. Excretory System 10. Nervous System 11. Receptor Organs 12. Reproductive System. Contents: Habit and Habitat of Leech External Structures of Leech Body Wall of [...]
List of three important members of Phylum Annelida:-1. Polychaetes 2. Oligochaetes 3. Hirudinea. Member # 1. Polychaetes: This group includes heterogeneous forms where variation is marked not only in size but also in habits and structural organisation. Following examples will illustrate the range of diversities: Arenicola: Burrows in sand; body is distinctly divisible into three regions—anterior region (or pre-branchial region) [...]