A system for controlling fluid flow inside a tubular in a wellbore for a cementing operation, comprising: a tubular; a sleeve coupled to the tubular, wherein the sleeve comprises an internal bore, an intermediate part, and a receiver portion within the internal bore, the receiver portion including a bottom wall and at least one port at a side wall for fluid flow through the internal bore; a channel element located in the internal bore of the sleeve, wherein the tubular, the sleeve and the channel element form a unit for insertion into the wellbore, wherein the channel element comprises an internal channel and an orifice for fluid flow between the internal channel and the internal bore of the sleeve, wherein the channel element is attached to the intermediate part via a breakable attachment portion and wherein the orifice is aligned with the at least one port of the sleeve in a first position of the channel element; a flow-through plug that is configured to be lowered onto the channel element before a non-flow-through plug is lowered into the wellbore and the tubular, wherein the flow-through plug comprises a breakable part that breaks under a first predetermined pressure, to allow fluid flow through the flow-through plug and into the internal channel after the breakable part breaks; and the non-flow-through plug, wherein the non-flow-through plug is configured to be lowered into the wellbore and the tubular and onto the flow-through plug after the breakable part breaks, and configured to exert a force onto the channel element, wherein the force breaks the attachment portion under a second predetermined pressure that is greater than the first predetermined pressure and moves the channel element relative to the sleeve to move the orifice out of alignment with the at least one port of the sleeve so that a portion of the channel element covers the at least one port of the sleeve in a second position of the channel element, wherein the flow-through plug is positioned between the non-flow-through plug and the channel element. a tubular; a sleeve coupled to the tubular, wherein the sleeve comprises an internal bore, an intermediate part, and a receiver portion within the internal bore, the receiver portion including a bottom wall and at least one port at a side wall for fluid flow through the internal bore; a channel element located in the internal bore of the sleeve, wherein the tubular, the sleeve and the channel element form a unit for insertion into the wellbore, wherein the channel element comprises an internal channel and an orifice for fluid flow between the internal channel and the internal bore of the sleeve, wherein the channel element is attached to the intermediate part via a breakable attachment portion and wherein the orifice is aligned with the at least one port of the sleeve in a first position of the channel element; a flow-through plug that is configured to be lowered onto the channel element before a non-flow-through plug is lowered into the wellbore and the tubular, wherein the flow-through plug comprises a breakable part that breaks under a first predetermined pressure, to allow fluid flow through the flow-through plug and into the internal channel after the breakable part breaks; and the non-flow-through plug, wherein the non-flow-through plug is configured to be lowered into the wellbore and the tubular and onto the flow-through plug after the breakable part breaks, and configured to exert a force onto the channel element, wherein the force breaks the attachment portion under a second predetermined pressure that is greater than the first predetermined pressure and moves the channel element relative to the sleeve to move the orifice out of alignment with the at least one port of the sleeve so that a portion of the channel element covers the at least one port of the sleeve in a second position of the channel element, wherein the flow-through plug is positioned between the non-flow-through plug and the channel element.