ANIMALS

2. ANIMALS

DID YOU KNOW THIS...?

1. How long can a snail sleep?

1. How many hearts does an octopus have?

1. Which is the slowest mammal in the world?

1. How long can the Greenland shark live?

1. What bird can fly backward?

And now....why don´t you look for any curiosity about any animal (maybe your favourite animal)

Animals are classified into : VERTEBRATES and INVERTEBRATES.

VERTEBRATES: Animals that have bones.

Types of vertebrates:

a. Mammals

b. Fish

c. Birds

d. Reptiles

e. Amphibians

a. Mammals:

Characteristics:

• They breathe through lungs
• They are born from mother´s womb. VIVIPAROUS.
• They have hair or fur.
• They drink their mother´s milk.
• They are warm-blooded.

QUESTION....What is the biggest and the smallest mammal?? and the fastest and slowest one??

b.Fish:
Characteristics:

• They breathe through gills.
• Their body is covered with scales.
• They live under the water.
• They are cold-blooded.
• They are born from eggs. OVIPAROUS
• They have fins to swim.

c. Birds

• They are born from eggs. OVIPAROUS.
• They breathe through lungs.
• Their body is covered with feathers.
• They have 2 wings.
• They are warm-blooded.

QUESTION...Can all the birds fly??...Tell me some examples...

d. Reptiles

-They have dry scaly skin.

-They are cold-blooded.

-They lay eggs. OVIPAROUS.

-They breathe through lungs.

-They have 4 legs or no legs.

e. Amphibians

- They have four legs or no legs

- They breathe through gills when they are babies, then with lungs

- They can live on land or in water

- They are cold blooded

- They lay many eggs. OVIPAROUS

- They have smooth skin.

INVERTEBRATES: Invertebrates are animals 

that do not have a skeleton.

Types of Invertebrates:

a. Arthropods: INSECTS, ARACHNIDS, CRUSTACEANS and MIRYAPODA

b. Molluscs

c. worms and leeches

d. Echinoderms

e. Cnidaria
f. Sponches

There are more than 2 million type of invertebrates. Some of them live in the land and some others live under the water. Like vertebrates they can be carnivores, herbivores and omnivores.

a. Anthropods:

Insects: Characteristics

- Their body is divided in three main parts.
-   They have two antennae on their head.
-    Six legs on the thorax
-    Most of them have four wings on the thorax.
-    When they hatch they are called larvae

 Parts: 

QUESTION...

Arachnids: Characteristics:

• They don´t have antennae.
• They have 8 legs.
• Their bodies are divided into 2 sections: Cephalothorax and abdomen.

Parts:

Types:

·        Black widow spider

·        Camel spider

·        Dust mite

·        Tick

·        Tarantula

·        Scorpion

Crustaceans: Characteristics:

• There are  as  plentiful in the oceans as insects are on the land (they are like the insects of the ocean). 
• They have jointed bodies and limbs, and a hard outer shell.

Types:

·        Crawfish

·        Krill

·        Hermit Crab

·        Horseshoe crab

·        Lobster

·        Shrimp

Myriapoda: Characteristics:

- They have a pair of antennae.

- They have two eyes.

- The mouth parts are on the underside of the head.

- They have two mandibles in the mouth.

TYPES:

 - Centipede

  - Millipede

  -Symphyla

  -Pauropoda.

b. Mollusks: Characteristics:

. They have soft bodies.

. Most of them have one or two shells.

. Almost all mollusks are marine animals.

Types:

. Clams

. Mussels

. Octopus/ Octopi

. Squids

. Snails 

c. Worms and Leeches: Characteristics:

- Worms are invertebrates with long, soft flexible bodies.

- They don´t have arms or legs.

Types:

·        Earthworm ·        Flatworm ·        Leech ·        Roundworm ·        Tapeworm

d. Echinoderms: Characteristics:

. They are marine animals.

. They get their names because of their spiny skin.

. They usually show a 5 part radial symmetry.

. Most of them are equiped with tube feet.

Types:

. Starfish

. Sand dollar.

. Sea urchins

. Sea cucumber

e. Cnidaria: Characteristics:

Characteristics:

. They are marine animals.

. They show radial symmetry.

. They have stingins cells to help capture food.

Types:

.Jellyfish

.Sea anemonas

.Corals

.Hydra

f. Sponges: Characteristics:

. They are the simplest animals.

. They are multicellular ( no tissues, muscles, nerves or internal organs)

. Mostly asymmetrical.

. They use water to filter food particles through their bodies.