Cell: Smallest Unit of

Life

Cancer Cells

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Eukaryotic (complex) vs.

Prokaryotic (simple) Cells

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http://www.cellsalive.com/howbig.htm

How Life is Organized

Eukaryotic Cell Plan

How Life is Organized

Prokaryotic Cell Plan Eukaryotic Cell Plan

Prokaryotic cell

Nucleoidregion

Nucleus

Eukar yotic cell Organelles

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Comparison of Cell Types

Note - Size, scale, internal organization of

each

Scale of LifeCells are limited in size because of

surface area to volume ratio

Too large a cell too much volume and not enough exchange with environment

Smaller cells less volume so easier for cell membrane to meet metabolic demand of the cell

Prokaryotic Cell Structure

Lacking well defined nuclei or organelles

Variety of shapes and sizes

Variety of Shapes and Sizes

Lyme’s Disease

Botchulism

Pneumonia

Strep Throat

Animal Cell

Compartmentalization of Eukaryotic Cells

Many small enclosed environments to create environments for unique chemical reactions.

Note the continuous flow of membranous compartments

Endomembrane system- internal system of membrane bound compartments

Plant Cell

Note the differences in structure to animal cell.

What are similarities?