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

2. Key Characteristics What are two characteristics of invertebrates? No _______________________ Many have ________________________ View Invertebrates CD Intro

3. Comparative Study of Invertebrates CharacteristicSpongesCnidariansWormsMollusksEchinodermsArthropods Symmetry Reproduction Digestion Protection Picture Due before test

4. Invertebrates Terms –Vertebrates –Invertebrates –Endoskeleton –Exoskeleton

5. 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…

6. Invertebrates (96% of animal kingdom) –May have _____skeletons –May have j______ –May have _________ Invertebrates Environments –They’re _______________! Do WB pg 73

7. Sponges, Cnidarians, & Worms Terms –Sponge –Cnidarian –Flatworm –Roundworm –Parasite –Segmented worm

8. 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

9. sponge

10. 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

11. cnidarian

12. 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. Picture ofPlatyhelminthes http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookDiversity_7.ht ml - Organization of the Animal Body

13. 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

14. 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 the same way. –Have two sets of __________. –Reproduce _____________. Do WB pg 78 Color worm picture

15. worms

18. Mollusks, Arthropods, & Echinoderms Terms –Mollusk –Arthropod –Arachnid –Insect –Echinoderm

19. 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 Snail

20. snail

22. 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 circulatory system and a brain –Many have well-developed organs for sight, sound and touch –Reproduce sexually –Female lays fertilized eggs –Examples include: beetles, butterflies, spiders, shrimp, centipedes and scorpions Color spider pictures (2)

23. Spider

24. Helpful & Harmful Arthropods –Fewer that 1% of arthropods are harmful Helpful ArthropodsHarmful Arthropods Color ant & lobster pictures

25. ant

26. lobstert

27. Echinoderms –Have endo_____________ –“echino” = spiny “derm” = skin –Live only in __________ –Examples starfish, sand dollars sea urchins, and sea cucumbers –No brain –___________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 83 Color starfish picture

28. starfish

29. Controlling Pests This would be a great article to research for extra credit :-) pg B94-B95 Do WB pg 84 Fill out graphic organixer