Different scientists have expressed different theories about the origin of tissue. However, according to many scientists, all tissues originate from the apical dividing tissue. The dividing tissue located at the tip of plant roots, stems and branches is called apical dividing tissue. Dissection of plant roots and stem tips reveals no tissue other than dividing tissue. Again, if it is dissected a little behind it, apart from dividing tissue, other tissues such as skin, hypodermis, cortex, pericycle, vascular bundle, marrow, marrow etc. are found. From this it can be understood that these tissues have evolved from the dividing tissue at the apex. So it can be said that all tissues originate from the apical meristem.