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Introduction to the Animal Kingdom

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Presentation on theme: "Introduction to the Animal Kingdom"— Presentation transcript:

1 Introduction to the Animal Kingdom
Chapter 18

2 What Is an Animal? Eukaryotic Multicellular Heterotrophs No cell walls

3 INVERTEBRATES 95% of all animal species
No backbone or vertebral column Includes microscopic dust mites to the giant squid

4 VERTEBRATES Backbone Only 5% of all animals Fishes Amphibians Reptiles
Birds Mammals

5 What Animals Do to Survive
Feeding, Respiration, Circulation, Excretion, Response, Movement & Reproduction

6 Feeding

7 Feeding Styles Herbivores  eat plants Carnivores  eat other animals
Omnivores  eat plants & animals Detritivores  eat decaying plants & animals Filter Feeders  strain floating plankton

8 Respiration Oxygen IN Carbon Dioxide OUT

9 Circulation Transport materials around body Oxygen Nutrients Wastes

10 Excretion Removes all metabolic waste

11 Response React to environment Use specialized cells - nerves

12 Movement Most animals are motile by muscle contractions

13 Reproduction Sexual and Asexual Increase in numbers
Sexual helps maintain genetic diversity in populations

14 Body Symmetry Bilateral: An imaginary plane can divide the body into two equal halves. Example: crayfish Radial: any number of imaginary planes can be drawn through the center, dividing it into equal halves Example: sea anemone

15 Bilateral symmetry

16 Radial Symmetry

17 Trend in Animal Evolution
Complex animals  Higher levels of cell specialization Higher levels internal body organization Bilateral body symmetry Front end (head) with sense organs (cephalization) Body cavity formation: fluid filled space that allows for organs to grow & expand.

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