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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 • 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 Picture ofPlatyhelminthes http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookDiversity_7.ht ml - Organization of the Animal Body • 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. Roundworm • 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. • 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 _____________. 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 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 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) Spider • Helpful & Harmful Arthropods – Fewer that 1% of arthropods are harmful Helpful Arthropods Harmful Arthropods Color ant & lobster pictures ant lobstert • 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 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 organixer Do WB pg 84