The body has been called the Saccharum Munja and the filbrons pith is called the Soul. This is the excellent illustration given by persons knowing Yoga.
मुजं शरीरमित्याहुरिषीकामात्मनि श्रिताम्। एतन्निदर्शनं प्रोक्तं योगविद्भिरनुत्तमम्॥