Kitab Nagri

Short Note on Liver Fluke   It is an internal parasite. It belongs to phylum Platyhelminthes.     Habitat:   It lives in lungs, liver, stomach and intestine of other animals.     Life Cycle:   It has two hosts   i) One stage is in man, sheep or goat etc.   ii) Other is…

Characteristics of Phylum Platyhelminthes   i) They are also called flat worms because their body is flattened.   ii) These are triploblastic animals. So their body is divided into three layers. Ectoderm, Mesoderm and Endoderm.   iii) They are free living but most are parasites. Parasites live in the intestine and stomach of other animals.…

Short Note on JellyFish   It belongs to phylum Coelenterata.   Habitat:   It is marine animal.     Size:   Its size range is 2-40 cm. Some jelly fish are large in size. They may reach to 15 meters in length.     Shape:-   It has a cup shaped body and therefore called…

What are Coral Reefs   Corals are coelenterates living in limy skeletal cup which is secreted by the epidermis. After the death of organism, their skeleton, which is made up of calcium carbonate deposited at the bottom of seas. After thousands of years, they form rock like deposits known as coral reef. Sometime it causes…

Short Note on Hydra   It belongs to phylum Coelenterata.   Habitat:   It is a fresh water animal and found in pond, stream etc.   M:   It is 6-10 mm long in squeezed shape. In elongate shape it is 20-30 cm.   Structure:   i) Mouth is surrounded by many tentacles.   ii)…

Characteristics of Phylum Coelenterata   i) Animals belonging to this group have a special cavity called coelenteron hence they are called coelenterates.   ii) They are diploblastic animals having two cellular body layers. Outer layer is called ectoderm and inner layer is called endoderm.   iii) All animals are marine but some live in fresh…

Main Characteristics of Phylum Porifera   These animals are called Porifera because animals of this group have small pores on their bodies. These are called sponges.   Habitat:   They are aquatic animals and mostly found in sea water. Some are also found in fresh water.     Structure:   i) They are multicellular organisms.…

Short Note on Paramecium   Habitat:   It is mostly found in pools and ponds.   Shape:-   It has slipper shaped body covered with small cilia.   Locomotion:   Cilia act as oars in water and help to move paramecium.   Nutrition:   It feed on algae, bacteria and other small protozoans. Cilia push…

Characteristics of Protozoa   Habitat:   They live in damp, watery places, moist soil and in decaying matter of animals and plants.   Structure:   They are composed of only one cell. However they perform all the life activities e.g. intake of food, respiration and reproduction etc.   Mode of Life:   i) Mostly they…

Invertebrates and their Groups   The group of animals, which do not have vertebral column. There are twelve million kinds of invertebrates are present.   Their groups are as under:   i) Phylum Protozoa   ii) Phylum Porifera   iii) Phylum Coelenterata   iv) Phylum Platyhelminthes   v) Phylum Nematoda   vi) Phylum Annelida  …