CellsCells

VocabularyVocabulary

CellsCells – building blocks of – building blocks of life.life.

Tissues Tissues – a group of cells – a group of cells that work together as a that work together as a team.team.

OrgansOrgans – a group of tissues – a group of tissues working together to working together to perform a specific jobperform a specific job

Organ systemOrgan system – a group of – a group of organs that work together organs that work together to perform particular jobs. to perform particular jobs. An example is the An example is the digestive system.digestive system.

VocabularyVocabulary

OrganismOrganism – anything – anything that can live on its that can live on its own.own.

UnicellularUnicellular – single – single cell living on its own.cell living on its own.

Multi-cellularMulti-cellular – group – group of cells that can only of cells that can only exist when they are exist when they are together.together.

VocabularyVocabulary PopulationPopulation – a group of – a group of

organisms that are of the organisms that are of the same kind and that live in same kind and that live in the same area.the same area.

CommunitiesCommunities – 2 or – 2 or more different more different populations that live in populations that live in the same area.the same area.

Ecosystems Ecosystems – the – the community and all non-community and all non-living that affect it, such living that affect it, such as water, soil, rocks, as water, soil, rocks, temperature, and light.temperature, and light.

VocabularyVocabulary Cell membraneCell membrane – acts as a – acts as a

barrier between inside of the barrier between inside of the cell and the cell’s environment. cell and the cell’s environment. It also controls the passage of It also controls the passage of materials into and out of the materials into and out of the cell.cell.

OrganellesOrganelles – chemicals and – chemicals and structures that enable the cell structures that enable the cell to live, grow and reproduce.to live, grow and reproduce.

CytoplasmCytoplasm – cellular fluid – cellular fluid surrounding a cell’s surrounding a cell’s organelles.organelles.

Nucleus Nucleus – the membrane – the membrane covered organelle found in covered organelle found in eukaryotic cells; contains the eukaryotic cells; contains the DNA and serves as a control DNA and serves as a control center for the cell.center for the cell.

Eukaryotic vs. Prokaryotic cellsEukaryotic vs. Prokaryotic cells Eukaryotic – a cells Eukaryotic – a cells

contains a nucleus and a contains a nucleus and a complicated internal complicated internal structure.structure.

Has a nucleusHas a nucleus Membrane-covered Membrane-covered

organellesorganelles Linear DNALinear DNA Complex cellComplex cell All other cellsAll other cells

Prokaryotic – world Prokaryotic – world smallest cells and they do smallest cells and they do not have a nucleus . not have a nucleus . DNA is one long, circular DNA is one long, circular molecule shaped like molecule shaped like rubber band.rubber band.

No nucleusNo nucleus No membrane –covered No membrane –covered

organellesorganelles Circular DNACircular DNA Simple cellSimple cell BacteriaBacteria