the thumb and index finger; the lateral side of the thumb receives a branch directly from the radial artery.

In the hand

* Princeps pollicis artery - arises from the radial artery just as it turns medially to the deep part of the hand.
* Radialis indicis - arises close to the princeps pollicis. The two arteries may arise from a common trunk, the first palmar metacarpal artery.
* Deep palmar arch

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