All solid substances partake of earth, as also bones, teeth, nails, beard, the hairs on the body, hair, nerves, sinews, and skin.
रसनं चेन्द्रियं जिह्वा रसश्चापां गुणो मतः। संघातः पार्थिवो धातुरस्थिदन्तनखानि च।॥