�Nerve cells, Dendrite, Axon, Synapse, Blood vessel, Mitochondria, Lymph node, Tissue fragment, Stained cell nuclei, Microscopic organism (amoeba), Microscopic organism (paramecium), Microscopic organism (protozoan), Fibers, Cables, Transistors, Resistors, Capacitors, Diodes, Microchip, Wiring harness, Electrical connector, Medical instrument handle, Tubing, Needle, Scalpel, Syringe, Stethoscope, Anatomical structure (vertebra), Anatomical structure (ribcage)