Essi comprendono tessuti cardiovascolari (arterie, vene e valvole cardiache), tessuti oculari (cornea), elementi ossei e muscolo-scheletrici (cartilagini, tendini), cellule nervose e cerebrali, pelle, tessuti fetali, cellule riproduttive (spermatozoi, sperma e ovuli) e cellule staminali.
They include cardiovascular tissue (arteries, veins, and heart valves), ocular tissue (cornea), bone and musculo-skeletal elements (cartilage, tendons), nerve and brain cells, skin, foetal tissue, reproductive cells (semen, sperm, and ova) and stem cells.