These replaceable tissues offer unsurpassed realism in ultrasound imaging, even after repeated full catheterizations and needle insertions—there is no perceivable residual image of previous procedures. They are also ultra-durable and self-sealing tissues—capable of enduring hundreds of needle insertions and dozens of full catheterizations. The tissues include the necessary landmarks that are both palpable externally and visible under ultrasound and with an added soft tissue to increase vessel depth for a training variation.