What is an Animal PPt

Tissues• A group of similar cells thatperform a specific function in ananimal

Types ofTissues• Nervous tissue:• carries electrical• signals from one• part of the body to• another• Bone tissue: A hard• tissue that gives bones• their strength

Organ System• A group of organs that worktogether to perform a morecomplex function

Functions of Animals• Animals are very diverse– Size– Structure– Appearance– All carry outthe samebasic functions

Major Functions of Animals• Obtain food• Obtain Oxygen(O2)• Keep Internal conditions stable• Move• Reproduce

Obtaining Food and Oxygen• Animals are not autotrophs– can not make their own food• Must obtain food– Heterotrophs

Food providesanimals withraw materials– for growth– For activities• Breathing• Moving• Digestion• Oxygen allowsthem to releaseenergy from food

Food Acquisition• Animals acquire food in three ways– Herbivores– Eat plants

• Eating other organisms– Carnivores• Hunters• Predator and Prey

Decomposers• Break down organic materials

Scavengers• Eat dead and dying organisms

• Omnivore–Eats plants–and animals

Keeping conditions stable• Animals must maintain a stableenvironment in their bodies–Cells die if too hot–Or to cold

• ColdbloodedE c t o t h e r m

Endotherm• Warm blooded• Animal whose body regulates itown temperature• Controls the internal heat itproduces

Movement• All animals move in some wayduring their life• Required for animals to meet thebasic needs– Survival– Reproduction

Types of movement• Walk,• hop,• crawl• Swim• Fly

Reproduction• Necessary for the continuation ofthe species• May occur in two ways– Sexually-A new organismdevelops from the joining of twocells• Egg- Female sex cell• Sperm- Male sex cell

FertilizationEgg andspermcell join tocreate aneworganism

Asexual Reproduction• The process by which a singleorganism produces a neworganism identical to itself–Budding

Classification of Animals• Scientists have sorted and dividedanimals into 35 groups known asPhylums• Animals are• classified• according tohow they arerelated toother animals

Determined by :• Animals body• structure• The way an animal develops• DNA

Vertebrates–Animals with a backbone

InvertebrateAnimal without a backbone97% of all animals fall into thiscategory

Animal SymmetryThe balanced arrangement ofparts

Bilateral SymmetryOne line dividing into two mirrorimages

Characteristics of Animals withBilateral Symmetry• Larger• More complex• Front end• Move more quickly• and• efficiently• Streamlined body• Sense organs– Located in front end– Pick up information– about environment

Radial SymmetryEqually spaced around a centralpoint

Characteristics of Animals withradial symmetry• No distinct front or back end• All of them live in water• Most do not move very fast–Stay in one spot–Are moved by water currents–Creep along the bottom