Invertebrates Harcourt Science Unit B Chapter 3 Mrs. Strand 6th grade Lockwood Middle School.
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Transcript of 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
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
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
• 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
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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
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• 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.
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http://cache.eb.com/eb/image?id=33746&rendTypeId=4
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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
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http://www.warrenphotographic.co.uk/mdh/04912.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
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
• 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
• Helpful & Harmful Arthropods– Fewer that 1% of arthropods are harmful
Helpful Arthropods Harmful Arthropods
Color ant & lobster pictures
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http://www.learningtreasures.com/suite101/arthropods.jpg
• 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
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http://kentsimmons.uwinnipeg.ca/16cm05/1116/16anim5.htm