A withdrawal port (10; 50) for withdrawing a liquid, in particular blood, from a tubing, comprising: a housing; a first tube connection which is connected or connectable with an arm of a tubing; a second tube connection; a fluid connection, in particular a liquid connection, between the first and second tube connections (12, 13); and a receiving section which is suitable for reversibly releasably receiving a syringe section, particularly a syringe cone, of a syringe, wherein the withdrawal port (10; 50) is configured such that an insertion of the syringe section into the receiving section interrupts the fluid connection between the first tube connection and the second tube connection and causes fluid communication of the syringe section with the first tube connection, and wherein the withdrawal port (10; 50) is configured to retain the syringe section at the withdrawal port (10; 50) with a clamping force that is directed radially inwardly when the syringe section is inserted into the receiving section, wherein the housing comprises an aperture (33; 52) through which the syringe section is insertable into the receiving section of the withdrawal port (10; 50), and wherein the withdrawal port (10; 50) comprises a seal arranged at the aperture (33; 52), wherein the seal comprises a protrusion (34; 54) which extends into the aperture (33; 52) such that an outer surface of the seal is substantially flush with the housing or with a retainer of the seal when the syringe section is not inserted into the housing, wherein the outer surface (29; 55) of the seal, which is substantially flush with the housing or the retainer, forms an outer surface of the withdrawal port (10; 50) without pronounced steps for wipe disinfection. a housing; a first tube connection which is connected or connectable with an arm of a tubing; a second tube connection; a fluid connection, in particular a liquid connection, between the first and second tube connections (12, 13); and a receiving section which is suitable for reversibly releasably receiving a syringe section, particularly a syringe cone, of a syringe, wherein the withdrawal port (10; 50) is configured such that an insertion of the syringe section into the receiving section interrupts the fluid connection between the first tube connection and the second tube connection and causes fluid communication of the syringe section with the first tube connection, and wherein the withdrawal port (10; 50) is configured to retain the syringe section at the withdrawal port (10; 50) with a clamping force that is directed radially inwardly when the syringe section is inserted into the receiving section, wherein the housing comprises an aperture (33; 52) through which the syringe section is insertable into the receiving section of the withdrawal port (10; 50), and wherein the withdrawal port (10; 50) comprises a seal arranged at the aperture (33; 52), wherein the seal comprises a protrusion (34; 54) which extends into the aperture (33; 52) such that an outer surface of the seal is substantially flush with the housing or with a retainer of the seal when the syringe section is not inserted into the housing, wherein the outer surface (29; 55) of the seal, which is substantially flush with the housing or the retainer, forms an outer surface of the withdrawal port (10; 50) without pronounced steps for wipe disinfection.