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Cells

Cells!

 

 

 

Cell Theory:

All living things are made of cell(s)

Cells are the basic unit of life

All cells come from preexisting cells

 

 

 

There are two main types of cells:

Prokaryotes                                            Eukaryotes

Have no nucleus                                        Have a nucleus
Lack many structures in cell                    Have many organelles
Usually single celled organisms              Usually multi-cellular
Simple                                                          Complex
Tiny                                                               Larger

 

 

 

Image result for prokaryotic cells

 

 

 

 

Image result for animal cells

 

 

Cells have organelles:

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Image result for cell organelles

 

Let's look at some more closely:

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The cell membrane.

 

 

 

Image result for cell mitochondria

Mitochondria

 

 

Image result for cell chloroplast

Chloroplasts.

 

 

Image result for cell endoplasmic reticulum

Endoplasmic reticulum.

 

 

Image result for cell golgi body

Golgi apparatus

 

 

Image result for cell ribosome

Image result for cell ribosome

Ribosomes.

 

 

Image result for cell centrioles

Centrioles.

 

 

Image result for cell nucleus

Nucleus

 

 

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Cell wall

 

 

Image result for cell lysosome

Lysosome

 

 

Image result for cell vacuole

Vacuole

 

 

 

 

 

 

Moving stuff into and out of the cell requires either active transport (transmembrane proteins), or diffusion.

Image result for diffusion

 

However, because the membrane is semipermeable, diffusion can get interesting:

Image result for diffusion through a semipermeable membrane

 

This makes cells swell and burst when placed in hypotonic solution and shrink when placed in hypertonic solution.  Isotonic mean that it has the same amount of solutes as the cell.

 

 

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