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CNMS ICSE - 7 Std
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Key Terms

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Chapter: 03. Kingdom Animalia

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Kingdom Animalia: Multicellular, nongreen eukaryotes that lack a cell wall, are heterotrophic, and show limited growth.
Heterotrophic: The characteristic of being unable to manufacture food using solar energy, thereby feeding on plants, animals, or both.
Invertebrates: Animals that do not possess a vertebral column or backbone.
Vertebrates: Animals that possess a vertebral column or backbone.
Porifera: Pore-bearing aquatic animals, commonly known as sponges, which have pores all over their body to draw in water.
Coelenterata: Hollow sac-like aquatic animals with a single mouth opening surrounded by tentacles for catching food.
Tentacles: Finger-like processes surrounding the mouth of coelenterates used for catching food.
Platyhelminthes: Flatworms with thin, soft, flattened, and segmented bodies that lack a body cavity and mostly live as parasites.
Nemathelminthes: Roundworms with long, cylindrical, unsegmented, and sometimes thread-like bodies that live as parasites inside host animals.
Annelida: Segmented or true worms with soft, bilaterally symmetrical bodies, a body cavity, and a well-developed alimentary canal.
Nephridia: Special organs of excretion found in segmented worms or annelids.
Parapodia: Special structures, along with setae, used by annelids for movement.
Arthropoda: Invertebrates characterized by jointed limbs, a body divided into three parts, and a hard exoskeleton.
Exoskeleton: The hard external protective covering that covers the body of arthropods.
Crustaceans: A group of arthropods characterized by many jointed legs and a fused head and thorax.
Insects: A group of arthropods whose body is divided into head, thorax, and abdomen, typically possessing three pairs of legs and two pairs of wings.
Arachnids: A group of arthropods with a fused head and thorax and six pairs of appendages, including four pairs of walking legs.
Myriapods: A group of arthropods with long bodies divided into many segments, each having one or two pairs of legs.
Mollusca: Soft-bodied, unsegmented, and mainly aquatic animals enclosed in a hard shell, which use a muscular foot for locomotion.
Echinodermata: Spiny-skinned, rough, and star-shaped marine animals that lack a head and a tail.
Pisces: Cold-blooded aquatic vertebrates with streamlined bodies, fins for swimming, gills for respiration, and a two-chambered heart.
Amphibia: Cold-blooded vertebrates with slippery, slimy skin and three-chambered hearts that can live both on land and in water.
Reptilia: Cold-blooded land vertebrates with dry, scaly skin, claws, and three-chambered hearts that lay leathery eggs on land.
Aves: Warm-blooded flying vertebrates whose bodies are covered with feathers and possess a horny beak with no teeth and a four-chambered heart.
Mammalia: Warm-blooded, milk-nourishing vertebrates whose bodies are covered with hair, possess external ears, and have a four-chambered heart.
Mammary glands: Milk-producing glands found in female mammals used to nourish their young ones.
Marsupium: An abdominal pouch in female kangaroos where premature young ones are kept and fed on mother’s milk.
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