Which of the following group of lymph nodes does NOT receive direct lymphatic drainage from the perineum?
ASuperficial inguinal
BInternal iliac
CExternal iliac
DDeep inguinal
The aortic hiatus is formed by the right and left crura of the diaphragm. Which of the following structures does NOT pass through the aortic hiatus?
AThoracic duct
BLeft vagus nerve
CLeft gastric vein
DAzygos vein
Absence of lymph nodes is characteristic of -
APlacenta
BBrain
CLung
DLiver
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