1 Introduction Rapid development in miniaturized tissue and organ-like technology represents remarkable progress toward mimicking the form and function of native biological structures and realizing the ultimate goal of restoring damaged tissue or whole organs.[1] However, the limited ability of nutrients and oxygen to diffuse into dense cellular structures can often lead to cell necrosis, inhomogeneous tissue development and limited size.[2] Vasculature is the human body's inherent plumbing...