The 1st IP joint amongst the proximal and intermediate phalanges is recognized as the proximal interphalageal joint (PIP joint). The palm has 5 bones generally known as metacarpal bones, one particular to every from the 5 digits. Human arms comprise fourteen digital bones, also known as phalanges, or phalanx bones: https://bookmarkinglife.com/story5547489/5-simple-techniques-for-finger-monkeys-for-sale-in-usa