Laxmi Neupane 
Platyhelminthes (flatworms) definition Platyhelminthes are triploblastic, bilaterally symmetrical, dorsoventrally flattened, acoelomate flatworms with organ grade of construction without a definite anus, circulatory, skeletal or respiratory system but with Protonephridial excretory … Read more
Annelida definition Annelids are defined as triploblastic, bilaterally symmetrical, metamerically segmented, a coelomate worm with a thin flexible cuticle around the body. Figure: Diagram of Phylum Annelida. Source: Wikipedia Phylum … Read more
Aurelia is commonly referred to as jellyfish because it is made of a jelly-like substance. A jellyfish is not true fish which is a vertebrate animal with a backbone. It … Read more
Vorticella (L.,vortex=whirl pool) is a microscopic, unicellular eukaryotic ciliate. It occurs as a sessile attached by a stalk to the substratum. Its body is almost bell-shaped or campanulate with a … Read more
Euglena viridis (Gr.,eu, true+ glene, eyeball or eye pupil+L., Viridis, green) is a unicellular green organism with an eye-like photoreceptive structure. It is phytoflagellate as it possesses both chloroplasts as … Read more
Hydra reproduces asexually by budding and sexually by the formation of gametes. Asexual reproduction of Hydra by Budding Figure: Hydra Budding. 1. Non-reproducing, 2. Creating a bud, 3. Daughter growing out, … Read more
Locomotion in Hydra Hydras are essentially sessile animals. They live attached by their pedal discs to objects in the water. Brown and green hydras can remain fixed at one spot … Read more
Hydra are inconspicuous freshwater relatives of corals, sea anemones, and jellyfish that are classified under the phylum Cnidaria, Class Hydrozoa, Order Anthomedusae/Anthoathecata, and Family Hydroidea. It is essentially a sedentary … Read more
Wuchereria bancrofti is a filarial nematode that causes Wuchereriasis or filariasis(commonly called elephantiasis) in human beings. The name of this worm is given Wuchereria bancrofti in honor of the two … Read more
Reproductive system of earthworm Earthworms do not reproduce asexually. Reproductive organs are somewhat complicated. The pheretima is monoecious or hermaphrodites having both male and female reproductive organs in the same … Read more
