During the process of metabolism and formation of rakta dhatu, tendons(kandara) and veins(sira) are formed as the metabolic byproducts(upadhatu).[Cha. Sa.[[Chikitsa Sthana]] 15/17]. Sharangadhara opines menstrual blood([[artava]]) as the metabolic by-product. | During the process of metabolism and formation of rakta dhatu, tendons(kandara) and veins(sira) are formed as the metabolic byproducts(upadhatu).[Cha. Sa.[[Chikitsa Sthana]] 15/17]. Sharangadhara opines menstrual blood([[artava]]) as the metabolic by-product. |