Invertebrates Harcourt Science Unit B Chapter 3 Mrs. Strand 6th grade Lockwood Middle School

InvertebratesHarcourt Science

Unit B

Chapter 3

Mrs. Strand6th grade Lockwood Middle School

http://www.cybered.net/products/subjects/science/CyberEdBiology/invertebrates/

Key Characteristics

• What are two characteristics of invertebrates?

No _______________________

Many have ________________________

View Invertebrates CD Intro

Comparative Study of Invertebrates

Characteristic Sponges Cnidarians Worms Mollusks Echinoderms Arthropods

Symmetry

Reproduction

Digestion

Protection

Picture

Due before test

Invertebrates

• Terms– Vertebrates– Invertebrates– Endoskeleton– Exoskeleton

Two Types of Animals

• All animals have the same basic needs– F______

• If you want to guess what the animal eats, look at its _______.• Animals eat food to gain energy, but…

– O______• Animals can’t make _________ without oxygen.

– W_______• All animals are made up of cells which are made up mostly of

___________r.

– P__________• Animals need protection from _______ and from __________.• Some adaptations include…

• Invertebrates (96% of animal kingdom)– May have _____skeletons– May have j______– May have _________

• Invertebrates Environments– They’re _______________!

Do WB pg 73

Sponges, Cnidarians, & Worms

• Terms– Sponge– Cnidarian– Flatworm– Roundworm– Parasite– Segmented worm

Sponges, Cnidarians,& Worms

• Sponges– Filter ________ for food– Only _______ layers of cells– Some specialized cells to channel _______ or

carry _______ to other parts of the sponge– Skeleton is formed by ________ of spicules– Most live in ________ _______ __________– Most reproduce _____________, but not all

Color sponge picture

sponge

Watch video segmentBiology Animals: sponges

• Cnidarians– All have the ability to _________________.– All are _____________.– The mouth is connected directly to the ___________

of the body.– Wastes leave through the ___________.– Don’t have s___________, but do have t__________.– All live in water, most in sea water.– Have _____________ symmetry.

Color cnidarian picture

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.



http://images.google.com/imgres?imgurl=http://www.vattenkikaren.gu.se/fakta/arter/cnidaria/overcnid/nasssys.gif&imgrefurl=http://www.vattenkikaren.gu.se/fakta/arter/cnidaria/overcnid/nass10e.html&h=535&w=387&sz=16&hl=en&start=20&tbnid=rYEezAAhEtSguM:&tbnh=132&tbnw=95&prev=/images%3Fq%3DCnidarians%26gbv%3D2%26svnum%3D10%26hl%3Den%26sa%3DG



Cnidarian

Watch video segmentBiology Animals: Cnidarians & Echinoderms

• Worms– Have ____________ symmetry.

• Flatworms– Flat bodies– Digestive system with __________ opening– Simple n_______ s_________ in the head (eye spots)

» Planarians have mouth at the end of a long tube.» Have reproductive systems.» Reproduce ___________» Can r_______________ parts.



http://cache.eb.com/eb/image?id=33746&rendTypeId=4



http://creatures.ifas.ufl.edu/misc/land_planarians_photo1.htm

• Roundworms– Have round, tube-like bodies– Most are too _______ to be seen with the naked eye– Live in _____ types of environments.– Have ____________ system with two openings.– Muscles run _______________.– Have a _________ _________ with a brain and simple sense

organs.– Reproduce ____________.– Many _________ the organisms in which they live. (hosts)

• Parasitic Worms– ___________ the host while __________ themselves.– Frequently have _________ life cycles.

» Examples include h__________ and trichinella.

Roundworm



http://www.warrenphotographic.co.uk/mdh/04912.htm

http://www.beaglesunlimited.com/beaglehealth_canineintestinalworms.htm

• Segmented Worms– Made up of connected ____________.– Bodies are more _________ than other worms.– Breath through their ________.– __________ goes right into the circulatory system.– Waste leaves the body through the anal pore.– Have two sets of __________.– Reproduce _____________.

Do WB pg 78Color worm picture

Watch video segmentBiology Animals:Worms

worms

worms

worms

Mollusks, Arthropods, & Echinoderms

• Terms– Mollusk– Arthropod– Arachnid– Insect– Echinoderm

Mollusks, Arthropods, & Echinoderms• Mollusks

– More ________ than any animals studied before– Has a ________ body with no ________– “mollus” = soft– Most have a hard _________ for protection

• This shell grows within their body and is formed by the ____________

– Mollusks have a muscular “foot”– Mollusks reproduce __________

• Release sex cells into water, fertilized eggs mature to larvae, and then adults

Some are bi________ and some are uni_________

– Examples are clams, oysters, slugs,snails, squid and octapods

Color Land SnailWatch video segmentBiology Animals:Mollusks

snail

snail

• Arthropods– By far the l______________ phylum of animals

(1million+species)– Have jointed exo____________– Muscular system allows for ________ movements– Skeleton does not ________ as animal grows– All have legs, a digestive system with ____ openings, a

c__________ s________ and a b_________– Many have well-developed organs for s_____, s____ and

t_________– Reproduce _______________– Female lays f_____________ eggs– Examples include: beetles, butterflies, spiders, shrimp,

centipedes and scorpions

Color spider pictures (2)

Watch video segmentBiology Animals:Arthropods

Spider

• Helpful & Harmful Arthropods– Fewer that 1% of arthropods are harmful

Helpful Arthropods Harmful Arthropods

Color ant & lobster pictures



http://www.learningtreasures.com/suite101/arthropods.jpg

ant

lobstert

• Echinoderms– Have endo_____________– “echino” = spiny “derm” = skin– Live only in __________– Examples starfish, sand dollars sea urchins, and sea

cucumbers– No b_______– ___________l symmetry for body– Mouth is at ___________ of underside of body with

powerful jaws– Tube ___________– Most reproduce ___________, but may also

___________ body parts

Do WB pg 83Color starfish picture



http://kentsimmons.uwinnipeg.ca/16cm05/1116/16anim5.htm

starfish

Controlling Pests

• This would be a great article to research for extra credit :-) pg B94-B95

Do WB pg 84

Fill out graphic organizer

Documents

Invertebrates Harcourt Science Unit B Chapter 3 Mrs. Strand 6th grade Lockwood Middle School