Which part of the body does the right lymphatic duct drain into the right subclavian vein?

The right lymphatic duct is an essential component of the lymphatic system, responsible for draining lymph fluid from specific regions of the body. It primarily collects lymph from the right side of the head and neck, the right arm, and a portion of the right thoracic cavity. This collection of lymph is then transported directly into the right subclavian vein.

Understanding the functions and pathways of the lymphatic system highlights how the right lymphatic duct specifically serves the regions it drains. By channeling lymph from the right side of the head and neck, as well as the right arm, this duct plays a crucial role in maintaining fluid balance and facilitating immune responses in those areas.

Other regions of the body, such as the left side of the body, the lower body, or the entire body, do not drain into the right lymphatic duct. Instead, they are typically drained by the thoracic duct, which is responsible for larger portions of the body's lymphatic drainage. Thus, the correct answer accurately reflects the specific drainage function of the right lymphatic duct.