Brain matrices enable the meticulous slicing of neural tissue, crucial for examining intricate brain structures and functions. This precision is pivotal for achieving reproducible results in studies spanning from anatomical analysis to neurophysiological mapping and biochemical investigations. These matrices facilitate precise coronal or sagittal brain sectioning at 0,5 or 1mm intervals, ensuring uniform sample thickness. Heart matrices, on the other hand, play a vital role in cardiological studies. They allow for the exact slicing of cardiac tissue, essential for analyzing the heart's structure and assessing the impact of various interventions. The ability to produce uniform tissue samples is critical for understanding the nuances of heart diseases and evaluating therapeutic strategies.