A fluid cartridge having a bottom face and a front face, comprising: interfaces in the front face for connection to a cartridge receiving structure, the interfaces including an ink interface for transporting liquid between the fluid cartridge and the cartridge receiving structure and a gas interface for transporting gas to and from the fluid cartridge, a guide interface for guiding the cartridge along a straight line for connecting the interfaces, the guide interface being arranged on the bottom face and having a receiving opening near the front face, and a latch stop and a latch track arranged on the bottom face to guide and retain a latch of the cartridge receiving structure, wherein the latch track comprises a locking track and an unlocking track, and is arranged to move the latch with respect to the latch stop along the locking track into a locked engagement position at insertion, and along an unlocking track, different from the locking track, into an unlocked position at ejection, wherein the latch track further comprises a latch guide wall at the end of the locking track to receive a latch at the end of the locking track and to direct the latch to the latch stop, wherein the unlocking track comprises a latch re-direct wall to receive the latch when the latch stop and the latch track are pushed inwards and to guide the latch into the unlocking track for ejection out of a latch stop engagement position, wherein the fluid cartridge comprises an electrical circuit (10, 19) sunken with respect to the front face of the fluid cartridge to establish sideways connection, wherein the electrical circuit (10, 19) comprises a cartridge memory and provides cartridge characteristic data, wherein the electrical circuit (10, 19) comprises electrodes that extend in a plane (Y, Z) perpendicular to the front face and arranged on a line parallel to the front face and behind the front face, wherein the electrical circuit is arranged near a top surface of the fluid cartridge, the gas interface is arranged near the middle of the front face, and the ink interface and a guide receiving opening of the guide interface are arranged near a bottom face of the fluid cartridge. interfaces in the front face for connection to a cartridge receiving structure, the interfaces including an ink interface for transporting liquid between the fluid cartridge and the cartridge receiving structure and a gas interface for transporting gas to and from the fluid cartridge, a guide interface for guiding the cartridge along a straight line for connecting the interfaces, the guide interface being arranged on the bottom face and having a receiving opening near the front face, and a latch stop and a latch track arranged on the bottom face to guide and retain a latch of the cartridge receiving structure, wherein the latch track comprises a locking track and an unlocking track, and is arranged to move the latch with respect to the latch stop along the locking track into a locked engagement position at insertion, and along an unlocking track, different from the locking track, into an unlocked position at ejection, wherein the latch track further comprises a latch guide wall at the end of the locking track to receive a latch at the end of the locking track and to direct the latch to the latch stop, wherein the unlocking track comprises a latch re-direct wall to receive the latch when the latch stop and the latch track are pushed inwards and to guide the latch into the unlocking track for ejection out of a latch stop engagement position, wherein the fluid cartridge comprises an electrical circuit (10, 19) sunken with respect to the front face of the fluid cartridge to establish sideways connection, wherein the electrical circuit (10, 19) comprises a cartridge memory and provides cartridge characteristic data, wherein the electrical circuit (10, 19) comprises electrodes that extend in a plane (Y, Z) perpendicular to the front face and arranged on a line parallel to the front face and behind the front face, wherein the electrical circuit is arranged near a top surface of the fluid cartridge, the gas interface is arranged near the middle of the front face, and the ink interface and a guide receiving opening of the guide interface are arranged near a bottom face of the fluid cartridge.