IMMUNE SYSTEM MADE EASY- IMMUNOLOGY INNATE AND ADAPTIVE IMMUNITY SIMPLE ANIMATION: MEDSimplified on Mar 1, 2020 https://www.youtube.com/watch?v=k9QAyP3bYmc&t=45s - 2:22 Barrier 5:16 Innate 7:03 Cells of innate 15:12 Complement 16:36 Adaptive 22:21 Innate vs Adaptive