Cellular Signals

Watch this 3D animation Cell Signals that gives you a complete overview of what happens when a little boy falls and injures his knee. Do not worry if you do not understand it all but what do you fiind familiar about the contents of this video.
Explain
The following video explains cell to cell communication. Watch this as an overview.
Khan Academy, Cell to cell communication

PPT_SignallingMolecules_2017

Will break this up into the following three headings:

Signalling Molecules

Signal transduction

Apotosis

Responding to Antigens

Immunity