malpighian tubules. . PILA Reasons for identification : • It is a triploblastic, coelomate animal. • Body is covered by a calcareous shell.
• Internal organs are covered by a soft layer of skin called mantle. • Respiration is carried out through a number of feather like gills called ctenidia. • The mouth contains a rasping organ called radula. • Excretory organs are the nephridia.
• Blood contains a copper containing respiratory pigment, haemocyanin. • Their development includes a Veliger larva. Antennae Compound eye Tegmina Hind wing Abdomen Anal cerci Identification: The given specimen is identified as Cockroach. It belongs to the Phylum Arthropoda.
Apex Suture Body Outer lip Mouth Umbilicus Identification: The given specimen is identified as Pila . It belongs to the Phylum Mollusca. XI Std Biology-Zoology Glossary . STARFISH Arm or Ray Mouth Ambulacral groove Tube feet Identification: The given specimen is identified as Starfish .
It belongs to the Phylum Echinodermata. Reasons for identification: • It has spiny skin. • It has Water vascular system. • Tube feet help in locomotion.
• The adults are radially symmetrical. • Larvae are bilaterally symmetrical • Circulatory system is open type without heart and blood vessels. • It exhibits autotomy with remarkable power of regeneration. • Bipinnaria is the first larva in its development.
. BALANOGLOSSUS Identification: The given specimen is identified as Balanoglossus . It belongs to the Phylum Hemichordata. Proboscis Collar Trunk Reasons for identification: • It is a connecting link between invertebrates and chordates.
• The body is divided into anterior proboscis, a short collar and a long trunk. • It is a marine and bilaterally symmetrical animal. • Excretion is by a single proboscis gland. • Development is indirect with a free swimming Tornaria larva.
• Presence of buccal diverticulum is the significant character of this animal. XI Std Biology-Zoology Glossary . RAT Reasons for identification: • Presence of mammary gland is the unique feature of mammals. • Pair of pinnae or external ears are present.
• Heart is chambered. • Kidneys are metanephric