introduction to the animal kingdom chapter 18. what is an animal? eukaryotic eukaryotic...
TRANSCRIPT
Introduction to Introduction to the Animal the Animal KingdomKingdom
Chapter 18Chapter 18
What Is an Animal?What Is an Animal?
EukaryoticEukaryotic MulticellularMulticellular HeterotrophsHeterotrophs No cell wallsNo cell walls
INVERTEBRATESINVERTEBRATES
95% of all animal 95% of all animal speciesspecies
No backbone or No backbone or vertebral columnvertebral column
Includes Includes microscopic dust microscopic dust mites to the giant mites to the giant squidsquid
VERTEBRATESVERTEBRATES
BackboneBackbone Only 5% of all Only 5% of all
animals animals Fishes Fishes Amphibians Amphibians Reptiles Reptiles BirdsBirds MammalsMammals
What Animals Do What Animals Do to Surviveto Survive
Feeding, Respiration, Feeding, Respiration, Circulation, Excretion, Circulation, Excretion,
Response, Movement & Response, Movement & ReproductionReproduction
FeedingFeeding
Feeding StylesFeeding Styles
Herbivores Herbivores eat plants eat plants Carnivores Carnivores eat other animals eat other animals Omnivores Omnivores eat plants & animals eat plants & animals Detritivores Detritivores eat decaying plants eat decaying plants
& animals& animals Filter Feeders Filter Feeders strain floating strain floating
planktonplankton
RespirationRespiration
Oxygen INOxygen IN Carbon Dioxide OUTCarbon Dioxide OUT
CirculationCirculation
Transport materials Transport materials around bodyaround body
OxygenOxygen NutrientsNutrients WastesWastes
ExcretionExcretion
Removes all Removes all metabolic metabolic wastewaste
ResponseResponse
React to React to environmentenvironment
Use specialized Use specialized cells - cells - nervesnerves
MovementMovement
Most animals are Most animals are motile by muscle motile by muscle contractionscontractions
ReproductionReproduction
Sexual and Sexual and AsexualAsexual
Increase in Increase in numbersnumbers
Sexual helps Sexual helps maintain genetic maintain genetic diversity in diversity in populationspopulations
Body SymmetryBody Symmetry
Bilateral: An imaginary plane can Bilateral: An imaginary plane can divide the body into two equal divide the body into two equal halves.halves. Example: crayfishExample: crayfish
Radial: any number of imaginary Radial: any number of imaginary planes can be drawn through the planes can be drawn through the center, dividing it into equal halvescenter, dividing it into equal halves Example: sea anemoneExample: sea anemone
Bilateral symmetryBilateral symmetry
Radial SymmetryRadial Symmetry
Trend in Animal EvolutionTrend in Animal Evolution
Complex animals Complex animals Higher levels of cell specializationHigher levels of cell specialization Higher levels internal body organizationHigher levels internal body organization Bilateral body symmetryBilateral body symmetry Front end (head) with sense organs Front end (head) with sense organs
((cephalizationcephalization)) Body cavity formation: fluid filled space Body cavity formation: fluid filled space
that allows for organs to grow & that allows for organs to grow & expand.expand.