A surgical instrument, comprising: (a) a body; (b) a shaft assembly extending distally from the body; and (c) an end effector extending distally from the shaft assembly, wherein the end effector includes: (i) a first jaw having an anvil, wherein the anvil is configured to form a plurality of staples received thereagainst, (ii) a second jaw, wherein the first jaw is movable relative to the second jaw from an open configuration toward a closed configuration for capturing the tissue therebetween and forming the staples therein, and (iii) a staple cartridge, wherein the staple cartridge includes: the plurality of staples, a body, wherein the body is received by the second jaw, and a deck having a plurality of staple pockets such that the plurality of staples are configured to pass through the staple pockets, wherein the deck is configured to selectively move relative to the body from a first position to a second position for adjusting a height of the deck relative to the anvil while the body is received in the second jaw, characterized in that the staple cartridge further includes a hydraulic staple expander configured to receive a fluid, wherein the hydraulic staple expander is configured to selectively expand from a contracted state toward an expanded state upon receiving the fluid, and wherein the hydraulic staple expander is configured to direct at least one of the plurality of staples toward the anvil for forcing the at least one of the plurality of staples against the anvil and forming the at least one of the plurality of staples within the tissue. (a) a body; (b) a shaft assembly extending distally from the body; and (c) an end effector extending distally from the shaft assembly, wherein the end effector includes: (i) a first jaw having an anvil, wherein the anvil is configured to form a plurality of staples received thereagainst, (ii) a second jaw, wherein the first jaw is movable relative to the second jaw from an open configuration toward a closed configuration for capturing the tissue therebetween and forming the staples therein, and (iii) a staple cartridge, wherein the staple cartridge includes: the plurality of staples, a body, wherein the body is received by the second jaw, and a deck having a plurality of staple pockets such that the plurality of staples are configured to pass through the staple pockets, wherein the deck is configured to selectively move relative to the body from a first position to a second position for adjusting a height of the deck relative to the anvil while the body is received in the second jaw, characterized in that the staple cartridge further includes a hydraulic staple expander configured to receive a fluid, wherein the hydraulic staple expander is configured to selectively expand from a contracted state toward an expanded state upon receiving the fluid, and wherein the hydraulic staple expander is configured to direct at least one of the plurality of staples toward the anvil for forcing the at least one of the plurality of staples against the anvil and forming the at least one of the plurality of staples within the tissue. (i) a first jaw having an anvil, wherein the anvil is configured to form a plurality of staples received thereagainst, (ii) a second jaw, wherein the first jaw is movable relative to the second jaw from an open configuration toward a closed configuration for capturing the tissue therebetween and forming the staples therein, and (iii) a staple cartridge, wherein the staple cartridge includes: the plurality of staples, a body, wherein the body is received by the second jaw, and a deck having a plurality of staple pockets such that the plurality of staples are configured to pass through the staple pockets, wherein the deck is configured to selectively move relative to the body from a first position to a second position for adjusting a height of the deck relative to the anvil while the body is received in the second jaw, characterized in that the staple cartridge further includes a hydraulic staple expander configured to receive a fluid, wherein the hydraulic staple expander is configured to selectively expand from a contracted state toward an expanded state upon receiving the fluid, and wherein the hydraulic staple expander is configured to direct at least one of the plurality of staples toward the anvil for forcing the at least one of the plurality of staples against the anvil and forming the at least one of the plurality of staples within the tissue. the plurality of staples, a body, wherein the body is received by the second jaw, and a deck having a plurality of staple pockets such that the plurality of staples are configured to pass through the staple pockets, wherein the deck is configured to selectively move relative to the body from a first position to a second position for adjusting a height of the deck relative to the anvil while the body is received in the second jaw, characterized in that the staple cartridge further includes a hydraulic staple expander configured to receive a fluid, wherein the hydraulic staple expander is configured to selectively expand from a contracted state toward an expanded state upon receiving the fluid, and wherein the hydraulic staple expander is configured to direct at least one of the plurality of staples toward the anvil for forcing the at least one of the plurality of staples against the anvil and forming the at least one of the plurality of staples within the tissue.