Harcourt Science Unit B Chapter 3 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… Sharp pointy teeth, flat teeth, Wedge teeth Camouflage, grouping, poison, mimicking…

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 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 Some smaller sponges live in fresh water Color sponge picture

Biology Animals: sponges Watch video segment Biology Animals: sponges

Cnidarians All have the ability to _________________. 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 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. Tissues are groups of cells working together. All have a single opening with the tentacles surrounding the mouth. Difference between a polyp and a medusa is the direction of the opening. Color cnidarian picture

Biology Animals: Cnidarians & Echinoderms Watch video segment Biology Animals: Cnidarians & Echinoderms

Worms Have ____________ symmetry. Flatworms Flat bodies http://cache.eb.com/eb/image?id=33746&rendTypeId=4 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://creatures.ifas.ufl.edu/misc/land_planarians_photo1.htm

Roundworm Roundworms Parasitic Worms 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. http://www.warrenphotographic.co.uk/mdh/04912.htm Transferred to humans through undercooked pork or sea food. NO PINK!

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 _____________. Carbon dioxide leaves through the skin. One set for contraction (lengthwise)… The other for extension (in bands). All earthworms have both sexual parts. 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 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 Biology Animals:Mollusks 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 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 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