The arteries are branches of the femoral artery, but the veins are tributaries of the great saphenous veins.
Image courtesy of Grant's Atlas of Anatomy

Saphenous opening, anterior view

1. The oval shape of this opening in the fascia lata through which the geat saphenous veins passes to join the femoral vein that lies within the femoral sheath.

2. The sharp superior and inferior free margins of the opening, and the less sharply defined lateral margin.

3. The great saphenoue vein hooks over the inferior free margin; occasional, it joins the femoral vein 1 or 2 cm superior to inferior free margin.
Image courtesy of Grant's Atlas of Anatomy