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