A medical delivery system for delivering a fluid to a desired location within a body that includes a first member having an aperture, and a second member adapted to be positioned over the first member. The fluid to be delivered is contained within a fluid storage device, formed by at least one of the first member and the second member. The medical delivery system includes means for repositioning the first member relative to the second member between a first state preventing passage of the fluid through the aperture and a second state enabling passage of the fluid outward from the fluid storage device through the aperture.