Exosomes are small nano-sized extracellular vesicles secreted by many different cells that carry nucleic acids, growth factors, proteins, lipids, amino acids and other bioactive substances to play a role in the body's physiological and pathological processes. Exosomes, which contain trace amounts of genetic material and cell debris, cause a low level of immune response. While exosomes can be obtained from animal sources in biological fluids such as serum, plasma, cerebrospinal fluid, and all body cells, they can also be obtained from plant cells and used for therapeutic purposes. There is theoretical and practical training on exosomes and exosome applications.