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They don’t have a skeleton or a backboneMost of them are very small

Most of them are symmetricalMany of them are protected by a shell or an exoskeleton

Many invertebrates live in th sea, others in the land

Characterisctics Most of them can move, but some attach themselves to rocks or the sea floor Parasites live inside other animals

They are oviparous

 MolluscsArthropodsWorms

GROUPS CnidariansEchinoderms

Sponges

MOLLUSCS ARTHROPODS WORMS CNIDARIANS ECHINODERMS SPONGES

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Have an external exoeskeleton made up of many small plates and covers the legs, body and antennaeThe exoeskeleton is rigid, but from time to time the arthropods shed it and grows a new, flexible one. 

CHARACTERÍSTICS Their organs are well developed, they have antennae and eyes (simple or compound) 

Their body is divided in 3 parts: head, torax and abdomenINSECTS The torax has 6 legs

  Some have 4 wings  E.g: butterflies, flies, etc.

The body is divided in 2 parts: cephalothorax y abdomenHave 8 legsThey haven’t antennae

 ARACHNIDS E.g: spiders, scorpions, etcGROUPS

The body is divided in 2 parts: cephalothorax y abdomen  Have antennae

CRUSTACEANS Have 10 or more legs, the first 2 are pincher clawsThey are acuaticE.g: Lobsters, shrimps, crabs, etc.

The body is divided in 2 parts: head and thorax formed by ringsHave many legs

  MYRIAPODS Have 2 antennaeE.g: centipedes, millipedes, etc

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They have an inner exkeleton and backbone

Its body it’s divided into: head, trunk, limbs and sometimes tailCaracterísticas Groups: amphibians, fish, reptils, birds, mamals

 

They have head, trunk and a tailIts body is covered with scales and use their fins to swim.They are oviparous

Characteristics They breathe through gills located on the sides of the head

 Most are terrestrialMost of them have a head, a trunk, limbs and a tail

They need external heat, for these reason are called cold-blooded animalsThey breathe through lungs

Characteristics They are oviparousMost are carnivorous

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They have head, trunk and limbs

They can live on land but stay in, or near water to keep their skin moistThey are oviparous

The female lay eggs in pounds or rivers

Characteristics As young amphibians grow, their appearance changes completely

 

They have a head, a trunk, limbs and a tail  The front limbs are wings and the back limbs are legs  A bird’s skin is covered with feathers

Using their wings most birds can flyThey are called warm-blooded animals because their body temperature is constant

They breathe through their lungs  They warm the eggs Witt their body, this is called incubation  All are terrestrial but some spend a lot of time in water 

Características Each bird species eats its own food: seeds, fruit, insects or other birdsThey have a beak.

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They have a head, a trunk, limbs  Most have legs but some have fins, and bats have wings

Characteristics Have a body covered with hair or fur They are warm blooded animalsThey breathe air trhough their lungsAre viviparous, grow inside the female’s body

Baby mammals drink their mother’s milk Most are terrestrial, although some are aquatic (Dolphin)

Terrestrial The live on land.Mice, bears. kangaroos, edgehog...

TYPES OF

MAMMALS AquaticThey breathe air through their lungs

They feed their babies with milk Whale, dolphin

They can flyAerial They hunt using a kind of sonar 

Bats