This video discussing how the cells of our body share information and perform actions with one another by three main processes known collectively as signalling using transcription factors. It then discusses the second part of the chapter i.e HEALING. It states its steps and then discusses in detail the substep of healing which is Angiogenesis. Timeline: 0:00 Interferons 1:10 Signalling 2:10 Transcription factors 3:01 Extracellular Matrix 4:36 Genetic Collagen Disorders 6:45 Healing 7:43 Angiogenesis