Platyhelminthes Archives

Phylum Platyhelminthes- characteristics, classification, examples

August 25, 2020March 8, 2020 by 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 system and mesenchyme filling the space between the various organ of the body. Figure: Phylum Platyhelminthes. Source: WebMD and Wikipedia. Phylum Platyhelminthes (flatworms) characteristics They are free-living, commensal or parasitic. …

Characteristics of Invertebrates with examples

February 25, 2020June 21, 2019 by Sagar Aryal

Habitat They are found in seas, freshwater, air, land from snow to desert. 80% are found in terrestrial habitat. Most successful invertebrates of the lands are Arthropods. Protozoans are free-living, parasites or commensals. Sponges and Coelenterates are aquatic animals. Numerical Strength Among 1.25 million animal species, 95% (1.2 million) are invertebrates. Among 1.2 million invertebrates, 1 million are Arthropods. Shape …