TYPES OF ANIMALS//VERTEBRATES-MAMMALS,BIRDS,REPTILES,AMPHIBIANS,FISH//INVERTEBRATES-INSETS,ARACHNIDS,MOLLUSKS,CRUSTACEANS,WORMS,ECHINODERMS

 TYPES OF ANIMALS

Animals can be grouped into different types based on characteristics like body structure, reproduction, and habitat.

1. Vertebrates (Animals with a backbone)

2. Invertebrates (Animals without a backbone)

Main groups of vertebrates:

Five types of animals commonly referred to in biological classification are mammals, birds, reptiles, amphibians, and fish.  

Type	Description	Examples
Mammals	Have hair or fur, give birth to live young, feed babies with milk	Humans, lions, whales
Birds	Have feathers, lay eggs, most can fly	Eagles, parrots, penguins
Reptiles	Have scales, lay eggs, cold-blooded	Snakes, lizards, turtles
Amphibians	Live in water and on land, have moist skin, lay eggs	Frogs, salamanders
Fish	Live in water, have gills and fins, lay eggs	Sharks, salmon, goldfish

1. Mammals

• Warm-blooded

• Have hair or fur

• Give birth to live young (mostly)

• Feed babies with milk from the mother

• Have lungs and breathe air

Examples: Humans, dogs, elephants, whales

2. Birds

• Warm-blooded

• Covered with feathers

• Lay hard-shelled eggs

• Have beaks and two legs

• Most can fly, but not all (e.g., penguins, ostriches)

Examples: Eagles, pigeons, penguins, owls

3. Reptiles

• Cold-blooded

• Covered with scales

• Lay leathery eggs (on land)

• Breathe with lungs

Examples: Snakes, lizards, turtles, crocodiles

4. Amphibians

• Cold-blooded

• Begin life in water (as larvae with gills)

• Later live on land (with lungs and legs)

• Have moist skin, no scales

Examples: Frogs, toads, salamanders, newts

5. Fish

• Cold-blooded

• Live in water

• Have scales, fins, and gills to breathe

• Lay eggs (mostly soft-shelled)

Examples: Goldfish, sharks, salmon, tuna

Summary:

Type	Warm/Cold Blooded	Body Covering	Where They Live	How They Reproduce
Mammals	Warm-blooded	Hair or fur	Land or water	Live birth (mostly)
Birds	Warm-blooded	Feathers	Air, land, trees	Lay eggs
Reptiles	Cold-blooded	Scales	Mostly land	Lay eggs
Amphibians	Cold-blooded	Moist skin	Water & land	Lay eggs in water
Fish	Cold-blooded	Scales	Water	Lay eggs

Main groups of Invertebrates:

Main types of invertebrates  animals without a backbone are Insects, Arachnids, Mollusks, Crustaceans, Worms, Echinoderms

Type	Description	Examples
Insects	6 legs, most have wings	Ants, butterflies, bees
Arachnids	8 legs, no wings or antennae	Spiders, scorpions
Mollusks	Soft bodies, often with shells	Snails, octopuses, clams
Crustaceans	Hard shells, live mostly in water	Crabs, lobsters, shrimp
Worms	Long, soft bodies, no limbs	Earthworms, leeches
Echinoderms	Spiny skin, live in the ocean	Starfish, sea urchins

1. Insects

• Three body parts: head, thorax, abdomen

• Six legs

• Most have wings

• Antennae for sensing

Examples: Ants, bees, butterflies, beetles

2. Arachnids

• Eight legs

• Two body parts: cephalothorax and abdomen

• No wings or antennae

Examples: Spiders, scorpions, ticks, mites

3. Mollusks

• Soft bodies, often with a shell

• Some have tentacles

• Most live in water, some on land

Examples: Snails, slugs, octopuses, clams

4. Crustaceans

• Hard exoskeleton

• Jointed legs (usually 10 or more)

• Live mostly in water

Examples: Crabs, lobsters, shrimp, barnacles

5. Worms

• Long, soft bodies

• No legs or arms

• Live in soil, water, or inside other animals

Examples: Earthworms, flatworms, roundworms, leeches

6. Echinoderms

• Spiny skin

• Live only in the ocean

• Radial symmetry (body parts arranged in a circle)

Examples: Starfish, sea urchins, sea cucumbers

7. Cnidarians

• Soft-bodied, mostly jelly-like

• Have stinging cells for catching food

• Live in water

Examples: Jellyfish, sea anemones, corals

Summary:

Type	Key Features	Examples
Insects	6 legs, 3 body parts, often wings	Ants, bees, butterflies
Arachnids	8 legs, 2 body parts	Spiders, scorpions
Mollusks	Soft body, often with shell	Snails, octopuses, clams
Crustaceans	Hard shell, many legs	Crabs, shrimp, lobsters
Worms	Soft, long body, no legs	Earthworms, tapeworms
Echinoderms	Spiny skin, live in ocean	Starfish, sea urchins
Cnidarians	Soft body, stinging cells	Jellyfish, corals

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