Animals. Unit 2

Animals...

• are oviparous.

• carry out the three vital functions.

• are multicellular organisms.

• are autotrophic

• have got symmetry, body organization.

Animals...

• are heterotrophic

• are autotrophic

• can be vetebrates.

• can be invertebrates.

Most animals’ body parts are the same on both sides of their body = they're asymmetrical.

• False

• True.

What do animals’ bodies need to perform the three vital functions?

• organs

• light

• systems

• interaction

• symmetry

VERTEBRATES...

• They have got a hard internal skeleton and a vertebral column (a backbone).

• Some of them are protected by a hard shell or an exoskeleton.

• They have got a head, a main trunk and extremities.

• All are oviparous.

• Are animals.

INVERTEBRATES...

• They haven't got a hard internal skeleton or a vertebral column (a backbone).

• Some of them are protected by a hard shell or an exoskeleton.

• They have got a head, a main trunk and extremities.

• All are oviparous.

• Are animals.

There are five groups of vertebrates: fish, amphibians, reptiles, birds and mammals

• True

• False

FISH

• They can move everywhere: from side to side or up and down to push against the water and propel themselves forward.

• They’ve got fins.

• they've got lungs.

• They’ve got a torpedo-shaped body.

• are invertebrates.

Fish

• They are aquatic animals

• They could be anuras or

  urodelas.

• They are oviparous

• They could be bony or

  cartilaginous

• They could be squamata,

  testudines

  or crocodilia

Amphibians

• They’ve got gills and later develop lungs.

• They have got a tail.

  legs ending in five toes with claws.

• Some of them can respire using gills, lungs or their skin.

• They have got thick, scaly, impermeable skin, which protects them from predators and from drying out.

• They have got long, sticky tongues which they use

  to catch insects.