This book aims to investigate the histological features of barriers in the human body with the most up-to-date information. In this book, cellular diversity of barriers, cell properties, protein expression profiles of cells, cellular changes in barriers in pathological conditions, current immunohistochemical markers and imaging methods for imaging barriers will be discussed. In addition to revealing the histological characteristics of body barriers, the changes that molecular parameters in the barriers undergo in pathological conditions will be emphasized. In addition, the relationships...