part_of starts_at ends_at bladder detrusor muscle of bladder anatomical_structure The detrusor muscle of bladder (dmbl) (syn: smooth muscle layer of bladder) (TS:22-TS:28) is a thick layer comprised of irregularly oriented smooth muscle fibre bundles adjacent to the outer layer of bladder (serosa/adventitia of bladder). Marked by smooth muscle markers including Tgfb1, smooth muscle actins (smooth muscle alpha actin, smooth muscle gamma actin) and smooth muscle myosins (e.g. Myh11, smooth muscle myosin heavy chain), the major structural components of smooth muscle. Contains nerve of bladder detrusor muscle (TS:22-TS:28). EMAPA:28637 smooth muscle layer of bladder TS22 TS28