Medical devices for gastroenterology endoscopic use; a system that includes hemostatic powder and a delivery device for bleeding control in gastrointestinal tract and other human cavities for endoscopic procedures; absorbable and/or non-absorbable hemostat for control of bleeding; films, fluids, powders, gels for internal animal and human use for preventing adhesions and scar tissue, and for tissue and mucosal protection; a system that includes an injection syringe and submucosal injection agent for endoscopes used for the treatment of dissecting and resecting tumors and cancer, namely, submucosal injectable preparations for treatment of dissecting and resecting tumors and cancer; a syringe for injection of agents/fluids for endoscopic procedures; a pump and/or sprayer that provides air/gas for assisting the delivery of powder for endoscopic procedures; medical tubing, delivery device for delivering powder for endoscopic procedures; Injection needles, hemostat, sealant for endoscopic procedures