Described herein are apparatus, including multi-tissue body-on-a-chip apparatus. In some embodiments, described are apparatus including at least a first, second, and third chamber in fluid communication with one another and with at least one tissue in each chamber, such as, for example, liver tissue in said first chamber; cardiac muscle tissue in said second chamber; and lung tissue in said third chamber; and a common aqueous growth media in said first, second, and third chamber. In some embodiments, the apparatus includes a fourth chamber including testicular or ovarian tissue in said fourth chamber. In some embodiments, the apparatus includes an optional fifth or sixth chamber; each said chamber includes different additional tissue selected from the group consisting of vascular endothelial, skeletal muscle, kidney, nerve, brain, and intestinal tissue (e.g., small intestine tissue and/or colon tissue). Also described are methods of using an apparatus of the present invention.
