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 - Aschelminthes Body shape - Circular in cross-section, hence, the name roundworms. terrestrial or parasitic in plants and animals. organization and triploblastic .Habitat - They may be free living, aquatic and . Level of organization - organ-system level of body Symmetry - bilaterally symmetrical. . Body Cavity Pseudocoelomate animals. Digestive system - Alimentary canal is complete with a well developed muscular pharynx.
. Excretion - An excretory tube removes body Wastes from the body cavity tnrough the excretory pore . Reproduction - unisexual or dioecious. Also show sexual dimorphism (females are longer than males) Fertilisation - internal . Development - direct (the young ones resemble the adult) or indirect (larvae is present) Examples: Ascaris (Round Worm), Wuchereria (Filaria worm), Ancylostoma (Hookworm)
Male Female Fig: Aschelminthes Roundworm Source:- This image is from NCERT Textbook Page no. 52
Phylum - Annelida . Their body surface is distinctly marked out into segments or metameres (Latin, annulus: little ring) and, hence, the phylum name Annelida .Habitat - aquatic (marine and fresh water) or terrestrial; free-living, and sometimes parasitic. .Level of organization - organ-system level and triploblastic animals. Symmetry bilateral symmetry . Body cavity - present and coelomates. Locomotory organ - Body wall which has longitudinal and circular muscles. Aquatic annelids like Nereis possess lateral appendages, parapodia (for swimming).
Circulatory system - closed circulatory system . Excretory organ - Nephridia which help in osmoregulation and excretion. Nervous system - consists of paired ganglia connected by lateral nerves to a double ventral nerve cord .Reproduction - some are unisexual or dioecious (Nereis) and some are bisexual or monoecious (earthworms and leeches). Reproduces sexually Examples: Nereis, Pheretima (Earthworm) and Hirudinaria (Blood sucking leech)