plasma membrane
regulates what enters and leaves the cell; where cell makes contact with the external environment
Nucleus
controls all cell activity; determines what proteins will be made
Cytoplasm
contains the organelles; site of most cell activity
Endoplasmic Reticulum (ER)
where ribosomes do their work
Ribosomes
build proteins
Golgi apparatus
prepares proteins for use or export
Lysosomes
responsible for breaking down and absorbing materials taken in by the cell
Cytoplasm
maintains cells shape
mitochondria and chloroplasts
Transforms one form of energy into another
Centrioles
cell division
Peroxisomes
detoxifies harmful substances