Which of the following lymphatic vessels drains into the right lymphatic duct?
Right Tibial vessels
Right iliac vessels
Right mammary vessels
Right femoral vessels
The Correct Answer is C
The right lymphatic duct drains lymph from the right side of the head, neck, right arm, and right side of the chest, including the right breast (right mammary vessels).
A. Right Tibial vessels drain lymph from the lower legs, which eventually drains into the thoracic duct, not the right lymphatic duct.
B. Right iliac vessels drain lymph from the pelvic region and also empty into the thoracic duct, not the right lymphatic duct.
D. Right femoral vessels drain lymph from the lower limbs, and their lymph also eventually drains into the thoracic duct.
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Related Questions
Correct Answer is D
Explanation
A. Lacteal is a lymphatic vessel located in the villi of the small intestine that absorbs fats, not the enlarged portion of the thoracic duct.
B. Hilum refers to the area on an organ where vessels, nerves, or ducts enter or leave, but it is not the enlarged portion of the thoracic duct.
C. The Right lymphatic duct is a separate duct that drains lymph from the right side of the body, not the enlarged portion of the thoracic duct.
D. Cisterna chyli is the enlarged, sac-like structure at the lower end of the thoracic duct, where lymph from the lower body and digestive organs (containing chyle) is collected before being transported into the thoracic duct.
Correct Answer is C
Explanation
A. Neutrophils are a type of white blood cell that primarily responds to bacterial infections and perform phagocytosis, not specifically attacking tumor or virus-infected cells.
B. Regulatory T cells help regulate the immune response and prevent excessive immune activity, but they do not directly attack tumor or virus-infected cells.
C. Natural killer (NK) cells are a type of lymphocyte that plays a key role in the body's defense against tumor cells and virus-infected cells by directly attacking and destroying them.
D. Memory T cells are responsible for "remembering" a previous pathogen, enabling a quicker response upon future exposure, but they do not directly attack tumor or virus-infected cells.
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