4. animalsovoviviparous animals ovoviviparous animals are a mixture of oviparous and viviparous...

4. Animals

Vertebrates - Vertebrates nutrition

- Vertebrates respiration

- Vertebrates reproduction

VERTEBRATES NUTRITION Animals eat other living things as other plants or

animals.

Most reptiles and amphibians are carnivores.

Mammals, birds and fish can be carnivores, herbivores

or omnivores.

VERTEBRATES RESPIRATION All animals need oxygen to live. They do it in different

ways.

Mammals, birds and reptiles Mammals, birds and reptiles take in oxygen from the

air thanks to the lungs. Carbon dioxide is left too

through the lungs.

AMPHIBIANS When amphibians are young, they breathe through

gills. When they are adults, they breathe through their

lungs.

VERTEBRATES

REPRODUCTION - Oviparous animals

- Viviparous animals

- Ovoviviparous animals

Oviparous animals Birds, fish, reptiles and amphibians are oviparous

animals. It means that they lay eggs. Mammals that are

oviparous are called monotremes. The echidna is an

example.

ECHIDNA

Viviparous animals Viviparous animals are born from their mother`s

womb. All baby mammals drink their mother`s drink,

including monotremes.

Ovoviviparous animals Ovoviviparous animals are a mixture of oviparous

and viviparous animals.

They produce eggs (like oviparous animals) but the

difference is, that they produce and develop these

eggs inside the mother. The tiger shark is an example

of ovoviviparous animal.

INVERTEBRATES Invertebrate animals don`t have a backbone. We can

differentiate six groups: arthropods, molluscs,

echinoderms, annelids, sponges and cnidarians.

ARTHROPODS All arthropods have exoskeleton

Types of arthropods:

- Crustaceans (crab)

- Myriapods (centipede)

- Arachnids (spider)

- Insects (bee)

MOLLUSCS

Molluscs is the other group of invertebrates. We can

differentiate 3 subgroups:

- Gastropods

- Bivalves

- Cephalopods

GASTROPODS

They have soft body.

They live on land and in water.

Example: Snail

BIVALVES

They have soft body.

They live in water.

Example: Mussels.

CEPHALOPODS

They have soft body.

They live in water.

They have tentacles.

Example: Octopus

MEDIA CONTENT

Vocabulary (LINK)

Mammals (LINK)

Vertebrate animals (LINK)

Arthropods (LINK)

Invertebrate animals (LINK)

Molluscs (LINK)

In the jungle game (LINK)