Anmol Sharma is teaching live on Unacademy Plus
Class 11th 04. ANIMAL KINGDOM NEET/AIIMS ANMOL SHARMA
WHAT TO STUDY? Basis of Classification Levels of Organisation . Symmetry .Diploblastic and Triploblastic Organisation (Germ Layer) . Coelom Segmentation Notochord . Classification of Animals . Phylum Porifera Phylum Colenterata Phylum Ctenophora . Phylum Platyhelminthes .Phylum Aschelminthes Phylum Annelida . Phylum Arthropoda . Phylum Mollusca Phylum Echinodermata Phylum Hemichordata . Phylum Chordata
* Class Chonarichythyes * Class Amphibia . Class Aves Class Cyclostomata Class Osteichthyes Class Reptilia . Class Mammalia Key Point of Animal Kingdom
Phylum - Arthropoda This is the largest phylum of Animalia which includes insects. Level of organization - organ-system level of organisation. Symmetry, body cavity - bilaterally symmetrical, triploblastic, segmented and coelomate animals. Skeleton - exoskeleton made up of chitin. Body division - The body consists of head, thorax and abdomen. Locomotion - by jointed appendages (arthros-joint, poda-appendages), hence name arthropoda. Respiration - by gills, book gills, book lungs or tracheal system. Circulatory system - open type
Sensory organs - antennae, eyes (compound and simple), statocysts or balance organs are present. * Excretion - through malpighian tubules * Reproduction - mostly dioecious animals Fertilisation - usually internal. They are mostly oviparous. Development - direct or indirect.
Examples: Economically important insects - Apis (Honey bee), Bombyx (Silkworm), Laccifer (Lac insect) .Vectors Anopheles, Culex and Aedes (Mosquitoes) Gregarious pest Locusta (Locust) Living fossil crab) - Limulus (King
Phylum - Mollusca . This is the second largest animal phylum. . Habitat - terrestrial or aquatic (marine or fresh water) Symmetry, coelom - bilaterally symmetrical, triploblastic and coelomate animals. Body division - Body is covered by a calcareous shell and is unsegmented with a distinct head, muscular foot and visceral hump Special structure - A soft and spongy layer of skin forms a mantle over the visceral hump Respiration and excretion The space between the hump and the mantle is called the mantle cavity in which feather like gills are present. They have respiratory and excretory functions. .
* Sense organs - The anterior head region has sensory tentacles Feeding organ - The mouth contains a file-like rasping organ for feeding, called radula .Reproduction and development usually dioecious and oviparous with indirect development. Examples: Pila (Apple snail), Pinctada (Pearl oyster), Sepia (Cuttlefish), Loligo (Squid), Octopus (Devil fish), Aplysia (Seahare), Dentalium (Tusk shell) and Chaetopleura (Chiton)