Lymphatic System

Step 1: Understanding the anatomical structure. The term "Tumbaika" refers to the cisterna chyli, a major lymphatic structure in the body. It is an elongated sac-like structure located in the abdomen, serving as the origin of the thoracic duct.

Step 2: Function of the cisterna chyli. The cisterna chyli collects lymph from the lower limbs, pelvis, and abdomen and then drains it into the thoracic duct, which eventually empties into the venous circulation.

Step 3: Identifying 'X' in the diagram. In the given anatomical diagram, the pointed 'X' corresponds to the cisterna chyli (Tumbaika) in the lymphatic system, highlighting its crucial role in lymph drainage.

Conclusion: The pointed 'X' in the figure represents Tumbaika (Cisterna Chyli), which is an essential component of the lymphatic system.