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FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Chapter 7Cell Structure & Function
Section 7-4Section 7-4
The Diversity of Cellular LifeThe Diversity of Cellular Life
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Unicellular Organisms
• Cells Are:Cells Are:– The Basic Living Units Of All OrganismsThe Basic Living Units Of All Organisms
• Unicellular OrganismsUnicellular Organisms– GrowGrow
– RespondRespond
– ReproduceReproduce
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Unicellular Organisms
• ProkaryotesProkaryotes• Live EverywhereLive Everywhere
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Unicellular Organisms
• EukaryotesEukaryotes–Many live their entire lives as Many live their entire lives as
single cellssingle cells
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Unicellular Organisms
• EukaryotesEukaryotes• Some protists and algae are Some protists and algae are
unicellular but live in coloniesunicellular but live in colonies
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Multicellular Organisms
Key ConceptKey Concept::Cells In Multicellular Organisms Cells In Multicellular Organisms
Are Specialized To Perform Are Specialized To Perform Particular Functions Within The Particular Functions Within The OrganismOrganism
Cell SpecializationCell Specialization
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Red Blood Cells
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Pancreatic Cell
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Nerve Cells
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Muscle Cells
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Levels of Organization
Key ConceptKey Concept::The Levels Of Organization In A The Levels Of Organization In A
Multicellular Organism Are:Multicellular Organism Are:Individual CellsIndividual CellsTissuesTissuesOrgansOrgansOrgan SystemsOrgan Systems
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Cells
SpecializationSpecialization
AndAnd
InterdependenceInterdependence
Make Multicellular Organisms Make Multicellular Organisms WorkWork
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Tissues
• Group Of Similar Cells That Group Of Similar Cells That Perform A Particular FunctionPerform A Particular Function
• Four Main Types:Four Main Types:– MuscleMuscle
– EpithelialEpithelial
– NervousNervous
– ConnectiveConnective
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Organs
• Many Groups Of Tissues Working Many Groups Of Tissues Working TogetherTogether
• Muscle Tissue Contains:Muscle Tissue Contains:
– Muscle CellsMuscle Cells
– Nerve CellsNerve Cells
– Connective Tissue CellsConnective Tissue Cells
– Blood SupplyBlood Supply
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Organ Systems
A Group Of Organs Working Together To A Group Of Organs Working Together To Perform A Specific FunctionPerform A Specific Function
FOOTHILL HIGH SCHOOL SCIENCE DEPARTMENT
Organ Systems
• NervousNervous
• SkeletalSkeletal
• MuscleMuscle
• IntegumentaryIntegumentary
• CirculatoryCirculatory
• RespiratoryRespiratory
• DigestiveDigestive
• ExcretoryExcretory
• EndocrineEndocrine
• ReproductiveReproductive
• ImmuneImmune
