In Human Design, there are nine Centers in the Bodygraph, each governing a specific aspect of human experience: Head (inspiration), Ajna (mental processing), Throat (communication/action), G/Self (identity/direction), Heart/Ego (willpower), Sacral (life force), Solar Plexus (emotions), Spleen (intuition/survival), and Root (pressure/drive). Centers can be defined (colored in — consistent energy) or undefined (white — amplifying and variable).