Abstract: A respiratory system includes a gas supply unit and a heating and humidifying unit. The gas supply unit includes a gas supply port; the heating and humidifying unit is detachably combined with the gas supply unit. The heating and humidifying unit includes a base, an adapter and a water tank. The base includes a control element, and the adapter is combined with the base and can rotate at least 90 degrees relative to the base. The water tank is detachably combined with the base, and the water tank includes a gas inlet and a gas outlet, wherein when the water tank is combined with the base, the gas inlet penetrates through an aperture of the base to be fluidly connected to the gas supply port, and the gas outlet is fluidly connected to the adapter.

Abstract: A support structure includes a mattress, a bottom sheet, at least one side guard and at least one positioning assembly. The mattress has a plurality of bladders. The side guard is disposed on any one lateral side of the top surface of the mattress. The positioning assembly can fix the side guard to the mattress. The side guard can protect two sides of a bedded person and prevent the bedded person from falling from the mattress. When the side guard is pushed by an external force, the bedded person does not fall into the vertical gap.

Abstract: A support structure includes a mattress, a bottom sheet, at least one side guard and at least one positioning assembly. The mattress has a plurality of bladders. The side guard is disposed on any one lateral side of the top surface of the mattress. The positioning assembly can fix the side guard to the mattress. The side guard can protect two sides of a bedded person and prevent the bedded person from falling from the mattress. When the side guard is pushed by an external force, the bedded person does not fall into the vertical gap.