Helpless animals kept in captivity https://www.rawpixel.com/image/462199/free-illustration-vector-extinction-prison-bird-cageView licenseMuscles of the rib-cage. Engraving by C. Grignion after B.S. Albinus, 1748. https://www.rawpixel.com/image/13998043/muscles-the-rib-cage-engraving-grignion-after-bs-albinus-1748Free Image from public domain license