Tissue and organ fabrication is enabled through tissue engineering principles, utilizing cells, biomaterials, and technology to produce constructs that mimic the function and design of its counterpart within the human body. Bioprinting, a primary form of extrusion printing, is used in tissue engineering to create these constructs. The most common is to load cells on printed scaffolds which can be made of naturally derived polymers, such as alginate, chitosan, gelatin, or collagen as well as synthetic polymers, polycaprolactone (PCL), poly(lactic acid) (PLA), poly(glycolic acid) (PGA), or poly(lactic-co-glycolic acid) (PLGA). The cells attach to these scaffolds and proliferate, developing their own extracellular matrix. From here, the cells can mature and are regulated with the appropriate stimuli.