Classifications of Organisms
Invertebrates
Vertebrates
Porifera
Fixed to Some object
Ex:- Sponge
Mostly Found in Seas
Body is Porous
Cnidaria
Aquatic Animals
Sac- like Body
Mouth surrounded by Finger like Projections
Ex:- Jellyfish Link Title)
Platyhelminthes
Body thin and flattened
Mostly live as parasites in other animals
Ex:- Tapeworm Link Title
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Nemadota
Body is rounded and unsegmented
Mostly live as parasites in humans
Ex:- Ascaris Link Title
Annelidia
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Body composed of rings or segment
They have soft, moist body wall through which they breathe
They have special organs for excretion called nephridia
Ex:- Earthworm
Arthropoda
Divided in 3 parts head, thorax and abdomen
Joined legs
Divided in 4 classes
Crustacea
Myriapoda
Insecta
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Archanida
Mollusca
Soft body not segmented
Body is enclosed in hard shell
Move with the help of muscular foot
Ex:- Octopus Link Title
Echinodermata
Body is rough
Mainly Marine
Have Tube Feet
Radically Symmetrical Bodies
Ex:- Starfish Link Title
Pisces
Fishes
Streamlined body
Body covered with scales
Breathe through gills
Ex:- Rohu
Amphibia
Can live in water and on land too
Lay their eggs in water
Body covered by a slimy and slippery skin
Ex: Frog and Toad
Reptilia
Mostly live in land, some love in water too
Skin is dry and scaly
Breathe through lungs
Females lay soft shelled eggs on land
Have four short legs for crawling on land
Ex:- Lizard
Aves
Birds
Body covered with feathers
Have wings to fly
Bones are hollow and light in weight
Legs bear scales and toes have claws
Jaws provided with horny beak but have no teeth
Females lay hard shelled eggs
Ex:- Pigeon
Mammalia
Body covered with hair
Possess projecting external ears
Give birth to young ones (babies)
Young ones suckle milk from mammary glands present in mothers
Usually have a tail (except humans) and four limbs
Ex:-- Humans