In Rakta Vaha Srotas, Upadhatu comprises which structures?

• A. sira, kandara
• B. tvak, vasa
• C. Pores
• D. Vessels

Answer: (A)

In this context, Upadhatu are the secondary structures that accompany or arise with a specific Srotas, providing the supporting framework for its function. For the Rakta Vaha Srotas (the channel system of blood), the most appropriate Upadhatu are the vascular and connective-tissue elements that form the surrounding infrastructure of the blood channels. That means sira, the vessels themselves, and kandara, the ligaments/connective tissue that hold and organize tissues around the vessels. These elements align with how the blood-channel system is supported and integrated with the body’s connective framework. Pores and tvak or vasa do not fit as the Upadhatu for this Srotas, making sira and kandara the best pairing.