introduction to animals chapter 9 section 1-2. what is an animal? eukaryote heterotroph...
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![Page 1: Introduction to Animals Chapter 9 Section 1-2. What is an Animal? Eukaryote Heterotroph Multicellular ◦ Cells are usually arranged into tissues (muscle](https://reader036.vdocuments.us/reader036/viewer/2022082611/56649eb35503460f94bba882/html5/thumbnails/1.jpg)
Introduction to AnimalsIntroduction to AnimalsChapter 9 Section 1-2
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What is an Animal?What is an Animal?EukaryoteHeterotrophMulticellular
◦Cells are usually arranged into tissues (muscle tissue)
◦Tissues are arranged into organs (heart)
◦Organs are arranged into systems (circulatory system)
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Functions of AnimalsFunctions of Animals
1. Obtain food and oxygen2. Maintain stable internal
conditions3. Movement4. Reproduction
◦(Vocab to remember: sexual reproduction, asexual reproduction, fertilization)
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Animal SymmetryAnimal SymmetrySymmetry: balanced
arrangement of partsTwo types
◦Bilateral - One line divides into halves that are mirror images (Isosceles triangle)
◦Radial – many lines of symmetry that all go through a central point (circle)
Asymmetry – no symmetry
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Animals with Radial Animals with Radial SymmetrySymmetryParts arranged
around a center point
Live in waterDon’t have a
front or back end
Do not move fast
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Animals with Bilateral Animals with Bilateral SymmetrySymmetryMore complex Have a front
endMove more
quicklyMost have
sense organs on front end (eyes, whiskers, nose, ears)