WHY DO WE HAVE OVER 35 TRILLION CELLS?. What is a cell?  Cell: Smallest unit of living matter that can carry out all processes required for life.

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Presentation transcript:

WHY DO WE HAVE OVER 35 TRILLION CELLS?

What is a cell?  Cell: Smallest unit of living matter that can carry out all processes required for life

Cells have 2 main categories  Prokaryotic Cells  NO nucleus  NO membrane-bound organelles  LOOSE DNA in the cytoplasm  Prokaryotes are single-celled  Eukaryotic Cells  Nucleus  Membrane-bound organelles  DNA found in the nucleus  Eukaryotes can be single or multi-cellular

2 Main types of Eukaryotic Cells  Animal Cells  Found in all animals  Plant Cells  Found in all plants

Organelles  Organelle = little organ  Structures specialized to perform distinct processes within a cell

Cytoplasm

Cytoskeleton

Nucleus

Endoplasmic Reticulum

Ribosomes

Golgi Apparatus

Mitochondria

Vacuole

Lysosome

Cell Wall – Plants only!

Chloroplast – Plants only!

Cilia

Cell Membrane/Plasma Membrane

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