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Introduction to Animals

Science, Grade 6

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Invertebrates Vertebrates Cnidarians Echinoderms Fishes Amphibians Reptiles Birds Mammals Segmented worms Spiders Centipedes Insects Crustaceans Mollusks Roundworms Flatworms Sponges Arthropods Skeletal System organ tissue cell Characteristics of Animals • Animals cannot make their own food. • Animals digest their food. • Most animals are capable of movement. • Animals are multicellular (have many cells). • Animal cells are eukaryotic. Each cell has a nucleus and organelles surrounded by membranes. • Most animals undergo sexual reproduction. Structure of Animals • The bodies of most animals (all except sponges) are made up of cells organized into tissues. • Each tissue is specialized to perform a specific function. • In most animals, tissues are organized into even more specialized organs. • Organs are organized into organ systems. Functions of Animals • Obtain food and oxygen • Maintain stable conditions within their bodies • Move in order to meet basic survival needs • Reproduce Animal Symmetry If you have ever looked into a mirror, you will notice that you could draw a line down the center of your face and the arrangement of facial structures will be balanced. This is called symmetry and it is an important characteristic of most of animals. There are two types of symmetry: bilateral and radial symmetry. Bilateral Symmetry Radial Symmetry No Symmetry Biologists so far have discovered over 1.5 million different types of animals. Animals are grouped according to how they are related to other animals. This branching tree shows how major animal groups are possibly related. Major Animal Groups Introduction to Animals © Copyright NewPath Learning. All Rights Reserved. 94-4605 www.newpathlearning.com

Invertebrates Vertebrates Arthropods Characteristics of Animals Characteristics of animals include: __________________________________ __________________________________ __________________________________ __________________________________ __________________________________ Structure of Animals • The bodies of most animals (all except sponges) are made up of cells organized into ________________. • Each ________________is specialized to perform a specific function. • In most animals, tissues are organized into even more specialized ________________. • Organs are organized into ________________. Functions of Animals Functions of animals include: _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ Animal Symmetry If you have ever looked into a mirror, you will notice that you could draw a line down the center of your face and the arrangement of facial structures will be balanced. This is called ________________ and it is an important characteristic of most of animals. There are two types of symmetry: ________________ and _______________. How are animals grouped? ____________________________ ____________________________ ____________________________ ____________________________ Major Animal Groups Key Vocabulary Terms • amphibians • mollusks • bilateral symmetry • multicellular • centipedes • organs • cnidarians • radial symmetry • crustaceans • reproduction • echinoderms • reptiles • eukaryotic • roundworms • fishes • segmented worms Introduction to Animals © Copyright N ewPath Learning. All Rights Reserved. 94-4605 www.newpathlearning.com \|xiBAHBDy01753qzZ

Introduction to Animals

Science, Grade 6

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