1º ESo Invertebrates editorial santillana, english review

Essential Natural Science 1Unit 4

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Contents

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Invertebrates

Porifera and Cnidaria

PoriferaCnidaria

Platyhelminthes

Characteristics

Molluscs

CharacteristicsClassification

Arthropods

CharacteristicsClassificationOrders of insectsInsect mouthsMetamorphosis

Echinoderms

CharacteristicsClassification

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Annelids

Characteristics

Nematodes

Characteristics


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What are porifera like?

What are cnidaria like?

How are molluscs classified?

What are molluscs like?

What are arthropods like?

How are arthropods classified?

What are insect mouths like?

Metamorphosis of the monarch butterfly

What are echinoderms like?

How are echinoderms classified?


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What are Platyhelminthes like?

LinksInteractive activity: What do you know about invertebrates?

Animation: Arthropods

What are Annelids like?

What are Nematodes like?

Orders of insects


What are porifera like?

Sponges

osculum

channelsatrium cavity

Porifera have no organs.

water + nutrients

water


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pores


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• radial symmetry

• soft body

• tentacles

• gastrovascular cavity

• carnivorous



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• radial symmetry

• soft body

• tentacles

• gastrovascular cavity

• carnivorous

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jellyfish


What are platyhelminthes like?

Platyhelminthes (flatworms)


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• flat bodies• divided into rings• hermaphrodites

Taenia tapeworm (parasite)

soft body

bilateral symmetry

no skeleton


What are nematodes like?

Nematodes (roundworms)


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soft body

bilateral symmetry

no skeleton

Pinworm

• cylindrical bodies

• no segments

• no respiratory system

• examples: trichina worms, pinworms


What are annelids like?

Annelids (segmented worms)

Earthworm


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• cylindrical bodies

• divided into segments

• some are hermaphrodites

soft body

bilateral symmetry

no skeleton

segments

clitellum

head

body wall

digestive tube

setae (hairs)

coelom



• bilateral symmetry• soft body• carnivores and herbivores• lungs (terrestrial molluscs)• gills (aquatic molluscs)• metamorphosis

valves

head

foot


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visceral mass



shell

valves

stomach

lung

eyes

mouth

ENLARGE IMAGE

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visceral mass




radula


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shell

valves

stomach

lung

eyes

visceral mass mouth


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How are molluscs classified?

snail

slug

limpet

Cephalopods

Bivalves

octopus

Gastropods


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nautilus cuttlefish

scallop

mussel


Animation: Arthropods


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• bilateral symmetry• exoskeleton• feeding habits vary• trachea (terrestrial arthropods)• gills (aquatic arthropods)• moulting and metamorphosis


abdomen

thoraxhead

ENLARGE IMAGE


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ENLARGE IMAGE

Wasp




ocelluscompound eye

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antenna

wings

legs

mouth parts

ENLARGE IMAGE




cephalothorax

chelicerae pedipalp


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ENLARGE IMAGE

abdomen

Spider

legs


Crustaceans

How are arthropods classified?

Myriapods

Insects


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Arachnids


Orders of insects

Hymenoptera

Dermaptera

Lepidoptera

Diptera

Orthoptera

Coleoptera

Hemiptera

Odonata Siphonaptera


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What are insect mouths like?

Ants have mouthsfor chewing.

Bees have mouthsfor chewing and sucking.

Butterflies have mouthsfor sucking.


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Mosquitoes have mouths for piercing and sucking.



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The Metamorphosis of a Monarch butterfly

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The metamorphosis of a Monarch butterfly

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• radial symmetry in adults• internal skeleton of plaques• carnivores• most breathe through skin• metamorphosis


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arms

ambulacral system

symmetrical planes


ambulacral system


• radial symmetry in adults• internal skeleton of plaques• carnivores• most breathe through skin• metamorphosis


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arms

symmetrical planes ambulacral feet


How are echinoderms classified?

Echinoidea Ophiuroidea

CrinoideaHolothuroideaStelleroidea

sea urchin ophiura

starfish sea cucumber


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sea lily


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The Shape of Life

1º ESo Invertebrates editorial santillana, english review

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Transcript of 1º ESo Invertebrates editorial santillana, english review