Ex vivo generated tissue system

A bioreactor, comprising:

• a matrix material positioned between at least a first and a second liquid chamber wherein the matrix material is configured to receive cells from the first liquid chamber and the first liquid chamber is operably linked to a seed port of cells and configured to transfer cells to the matrix material and the first chamber is configured to flow a first fluid tangentially to a surface of the matrix material in contact with the first fluid thereby providing an exchange of nutrients and metabolic products with the cells that have been received by the matrix material and the second chamber is configured to flow a second fluid tangentially to a surface of the matrix material in contact with the second fluid thereby providing an exchange of nutrients and metabolic products with the cells that have been received by the matrix material,
• a first and second gassing chamber operably linked to the first and second liquid chambers,
• a first gas permeable membrane positioned between said first liquid chamber and said first gas chamber and a second gas permeable membrane positioned between said second liquid chamber and said second gas chamber,
• said first and second gassing chambers providing gas that flows through the first and second gas permeable membranes;
• and thereby dissolves in the fluid in the first and second fluid chambers and diffuses therethrough to the cells contained in the matrix material which are consuming oxygen.