Animal kingdom

Animal kingdom

Animals are eukaryotic and usually multicellular.

Animal classification

All animals can be divided into two groups-vertebrates and invertebrates.

Vertebrates

  • Vertebrates are animals that have a skeleton inside their bodies.
  • Five group of vertebrates are
  • Amphibians, reptiles, fish, mammals and birds.
  • Amphibians, reptiles and fish are cold blooded.
  • Mammals and birds are warm blooded.

Invertebrates

  • Invertebrates don’t have backbone.
  • Insects and some other invertebrates have exoskeleton.
  • An exoskeleton is a hard outer covering that protects an animal’s body and gives it support.
  • There are six groups of invertebrates.
  • 1 Sponges. 2. corals, hydras, jellyfish. 3. worms, 4. Starfish and sea urchins, 5. Mollusks, 6. Arthropods.
  • Sponges, hydra, corals look like plants but they are animals.
  • A tapeworm is a flatworm that can live inside the body of animals and humans.
  • A snail is mollusks with a single hard shell.

Also Read:

Plant Kingdom

Branches Of Biology

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