Structure of Cells

Atoms → Molecules → organells → cells

Two Types of Cells → Prokayotes and Eukaryotes

Prokaryotes

• bacteria

• unicellular

• oldest living thing

• do not contain nuclei

• small simple cells

Eukaryotes

• plants, animals, fungi and protists

• uni or multicellular

• contain nuclei

• larger

• many orangells with own membranes

• highly specilized for their function

All Cells have

Boundaries

Cell membrane

• outermost layer in plants, fungi and prokayotes

• supports and protects the cell

Cell membrane

• controls materials entering and leaving the cell

• supports cells

Cytoplasm

• gel like substance that fills the cell

• cyto → cell

• site of many chemical reactions

Ribosomes

• proteins are assembled

• proteins are necessary for all of the chemical reactions in cells (enzymes)

DNA

• induces the instructions on how to make the proteins necessary for life processes