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Invertebrates
Harcourt Science
Unit B
Chapter 3
Mrs. Strand
6th grade
Lockwood Middle School
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 segment
Biology Animals: sponges
http://images.google.com/imgres?imgurl=http://www.vattenkikaren.gu.se/fakta/arter/cnidaria/overcnid/nasssys.gif&imgrefurl=http://www.vattenkikaren.gu.se/fakt
a/arter/cnidaria/overcnid/nass10e.html&h=535&w=387&sz=16&hl=en&start=20&tbnid=rYEezAAhEtSguM:&tbnh=132&tbnw=95&prev=/images%3Fq%3DCnidari
ans%26gbv%3D2%26svnum%3D10%26hl%3Den%26sa%3DG
Quic kTime™ and a
TIFF (Unc ompres sed) decompress or
are needed to see this picture.
Quic kTime™ and a
TIFF (Unc ompres sed) decompress or
are needed to see this picture.
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
• 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
Cnidarian
Watch video segment
Biology Animals: Cnidarians & Echinoderms
http://cache.eb.com/eb/image?id=33746&rendTypeId=4
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
• Worms
– Have ____________ symmetry.
• Flatworms
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
– 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://creatures.ifas.ufl.edu/misc/land_planarians_photo1.htm
Roundworm
• Roundworms
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
http://www.warrenphoto
graphic.co.uk/mdh/049
12.htm
–
–
–
–
–
–
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.
• 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 _____________.
Watch video segment
Biology Animals:Worms
Color worm picture
Do WB pg 78
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
Watch video segment
Color Land Snail
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
Watch video segment
Biology Animals:Arthropods
Color spider pictures (2)
Spider
• Helpful & Harmful Arthropods
– Fewer that 1% of arthropods are harmful
Helpful Arthropods
Harmful Arthropods
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
Color ant & lobster pictures
http://www.learningtreasures.com/suite101/arthropods.jpg
ant
lobstert
• Echinoderms
–
–
–
–
–
–
–
–
–
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
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
http://kentsimmons.uwinnipeg.ca/16cm05/1116/16anim5.htm
Color starfish picture
Do WB pg 83
starfish
Controlling Pests
• This would be a great article to research
for extra credit :-) pg B94-B95
Fill out graphic organizer
Do WB pg 84