This book reviews the endoplasmic reticulum, Golgi Appartus, Lysosomes and other membrane-enclosed organelles, demonstrating how their dysregulated function contributes to various pathologies. The chapters not only offer a platform for new perspectives but also stimulate further investigations. Given the translational nature of this subject, this book is a valuable resource for physiologists and clinicians alike. Chapter "Lipid Droplets in Cancer" is available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.