Bioreactor with lid for easy access to incubation cavity

A bioreactor adapted for rotation, the bioreactor comprising:

• an incubation chamber including an incubation cavity defined by a first cylindrical wall section extending from a first end of the incubation chamber to a second end of the incubation chamber, and a central axis extending from the first end to the second end, wherein the first end of the incubation chamber comprises a semipermeable membrane, permeable to gases and impermeable to cells and cellular aggregates, and wherein the second end of the incubation chamber is an open end;
• a lid removably attached to the first cylindrical wall section at the open end of the incubation chamber, the lid comprising a transparent section for visually monitoring the incubation cavity when the lid is coupled with the first wall section;
• a reservoir for housing aqueous media, wherein the reservoir comprises a second wall section extending from a first end of the reservoir to a second end of the reservoir;
• and
• an equilibrium chamber positioned between the incubation chamber and the reservoir and comprising a third wall section extending between the first end of the incubation chamber and the first end of the reservoir, said equilibrium chamber comprising a volume for an exchange of gasses;
• and
• a humidifier having a first portion arranged in the reservoir, a second portion arranged in the equilibrium chamber and extending from the reservoir to the equilibrium chamber wherein the humidifier is configured to facilitate evaporation of the aqueous media from the reservoir into the equilibrium chamber,
• wherein the bioreactor is configured to be rotated about a central rotational axis that coincides with the central axis of the incubation cavity.