Bioink is a specialized material used in 3D bioprinting, which combines living cells with a supportive matrix. This mixture allows for the creation of tissue-like structures that can mimic the natural environment of cells. Bioinks are designed to be biocompatible, ensuring that the cells remain viable and functional after printing. Researchers often use bioinks to develop tissues for medical applications, such as regenerative medicine and drug testing. By using bioinks, scientists can create complex structures that may eventually lead to advancements in organ transplantation and personalized medicine, enhancing the potential for treating various diseases.