dimensions in the range of about 1 cm u00d7 7 cm u00d7 10 cm inside bioreactor reaction volume of about 30 ml medium scale bioreactor may have outer dimensions in the range of about 3 cm u00d7 12 cm u00d7 22 cm inside bioreactor reaction volume of about 400 ml medium large scale bioreactor may have outer dimensions in the range of about 5 cm u00d7 22 cm u00d7 35 cm inside bioreactor reaction volume of about 2 liters large scale bioreactor may have outer dimensions in the range of about 10 cm u00d7 60 cm u00d7 60 cm inside bioreactor reaction volume of about 20 liters mega large scale bioreactor may have outer dimensions in the range of about 20 cm u00d7 90 cm u00d7 120 cm inside bioreactor reaction volume of about 100 liters the shape of the bioreactor may be varied so long as the bioreactor functions to produce cell derived products for instance the shape may not be limited to a rectangular shape any shape may be used so long as the object stably and effectively useable the outer dimensions of the bioreactor may be made in accordance with the appropriate setting and environment as used herein a u201c microcarrier u201d is a support matrix allowing for the growth of adherent cells in bioreactors microcarriers are typically 125 250 micrometer spheres and their density allows them to be maintained in suspension with gentle stirring microcarriers can be made from a number of different materials including deae dextran glass polystyrene plastic acrylamide collagen and alginate microcarriers may be used to grow protein producing or virus generating adherent cell populations in without limitation large scale commercial production of biologics for.