phylum

This phylum is the largest in the animal kingdom comprising of more than 75% of the animal species that have been identifie..

This phylum is characterized by three unique features, at least during the early stages of their development. A rod like structure called notochord lying above the digestive tract. A tubular nerve cord lying above the notochord. A pair of gill slits in the pharangeal region. Only the nerv..

Phylum Chordata - Presence of a solid supporting structure on the dorsal side of the body called notochord. Presence of a dorsal hollow, tubular nerve cords. Presence of pharyngeal gill slits at least in the embryonic stages. The phylum is divided into 4 sub phyla. Hemichordata,..

Phylum Chordata - Phylum Chordata is characterized by three unique features, at least during the early stages of their development. A rod-like structure called notochord lying above the digestive tract A tubular nerve cord lying above the notochord A pair of gill slits in the ph..

Features of Echinodermata..

Presence of a solid supporting structure on the dorsal side of the body called notochord. Presence of a dorsal hollow, tubular nerve cords. Presence of pharyngeal gill slits at least in the embryonic stages. The phylum is divided into 4 sub phyla. Hemichordata, Urochordata, Ceph..

Star fish Marine in habitat. Body is radially symmetrical, star shaped, spherical or elongate, Exoskeleton is spiny. Head is absent and five radially arranged arms present. Locomotion is with the help of tube feet. Sexes are separate. Example: Asterias (star fish), Echinus (sea urc..

Phylum Mollusca - Snail Aquatic in habitat but some land forms are also seen. Body is soft and divided into three regions (head, dorsal visceral mass and ventral foot). Body enclosed in a hard calcareous shell. Breathe through gills, land molluscs have lungs. Sexes are separate. Example: ..

Phylum Arthropoda - This phylum is the largest in the animal kingdom comprising of more than 75% of the animal species that have been identified. Free living forms, aquatic (fresh water or marine) or terrestrial or aerial. Some parasitic forms also. Body is elongated and segment..

Phylum Annelida - Free-living, terrestrial or aquatic form (freshwater or marine). Body is long, cylindrical and metamerically segmented. Body wall consists of cuticle, epidermis and musculature. Body cavity is a true coelom, lined by epithelium. Digestive system is complete. Respiration ..