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Difference between VERTEBRATES and INVERTEBRATES

Difference between VERTEBRATES and INVERTEBRATES

VERTEBRATES

  • Animals with backbone are called vertebrates. Although vertebrates represent less than two percent of animal species in the world, their size and mobility allow them to dominate their environment.
  • Vertebrates are further classified into five categories.

Fishes

Fishes share the following characteristics:

  • Cold blooded, which implies that their body temperature is regulated by environment.
  • Breathe using gills and not lungs. Lay many eggs.
  • Have scales and fins on their body.
  • Have ear holes.                    Difference between VERTEBRATES and INVERTEBRATES

Amphibians

Amphibians share the following characteristics:

  • Live on land as well as water.
  • Cold blooded.
  • Webbed feet that can be used for both swimming and walking.
  • Possess both lungs and gills; lungs are used to breathe on land and gills are used to breathe in water.
  • Usually possess four legs.
  • Lay many eggs.
  • Have ear holes.

Reptiles

Reptiles share the following characteristics:

  • Cold blooded.
  • Skin is dry and has scales.
  • Have ear holes instead of ears.
  • Lay
  • Have either four legs or no legs.

Birds

Birds share the following characteristics:

  • Warm blooded that helps in adjusting to the fluctuations of temperature in environment.
  • Have ear holes instead of ears.
  • Possess wings.
  • Lay eggs.
  • Have two legs.

Mammals

Mammals share the following characteristics:

  • Warm blooded.
  • Hair or fur on body.
  • Give birth to young ones.
  • Live on land.
  • Possess four limbs.
  • Have ears that stick out.

INVERTEBRATES

  • Invertebrates are those animals which do not have backbone. More than 98% of animal species are invertebrates.
  • Invertebrates do not possess internal skeleton made of bones. Many invertebrates have a fluid-filled (hydrostatic) skeleton as in jelly fish or earthworm.
  • Some invertebrates have hard outer shell. Invertebrates are further classified into five types.                Difference between VERTEBRATES and INVERTEBRATES

Annelids

Annelids possess the following features:

  1. Their bodies are divided into segments.
  2. Their bodies are filled with fluids.

Examples for annelids are earthworms and leeches.

Molluscs

Molluscs possess the following features:

1 . They have soft body covered with hard outer shell.

  1. Some molluscs live on land. E.g. snails.
  2. Some live in water.

Examples for molluscs are oysters, mussels, octopus and squids.

Echinoderms

Echinoderms possess the following features:

  1. Their limbs radiate from the centre of the body.
  2. The limbs have radial symmetry.                  Difference between VERTEBRATES and INVERTEBRATES

Examples for echinoderms are sea star or star fish.

Protozoans

Protozoans possess the following features:

  1. These are microscopic, single-celled smallest animals.
  2. They can breathe, reproduce and can perform other basic functions of a living organism.

Examples of protozoa are amoeba and flagella.

Arthropods

Arthropods possess the following features:

  1. They do not possess internal skeleton, but possess hard external skeleton.
  2. They have limbs with joints which enable ease in movement.

Arthropods are further classified into three types:

  1. Insects: Their body consists of three parts, six legs and a pair of antenna. Examples are fly, bee, wasp, etc.
  2. Arachnids: Their body consists of two parts and four pairs of legs. For example, spider, scorpio, etc.
  3. Crustaceans: They live in aquatic environment and are of diverse range. Examples are crab, lobster, etc.

Eurythermal and Stenothermal Organisms

Eurythermal organisms are those which can tolerate and thrive in a wide range of temperatures. Examples are cat, dog, tiger, sea grass, etc.

Stenothermal organisms are those which are restricted to narrow range of temperatures only. Stenothermal organisms can be those which can thrive either at higher temperatures or at lower temperatures. Examples are corals, jelly fish, etc.                    Difference between VERTEBRATES and INVERTEBRATES

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Environment & Biodiversity

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