articulation or a joint
ALMAR
Articulation
A joint
An urban region with more than 10 million inhabitants is called a megacity.
Region
Union Flag, or more casually the Union Jack
Region
Joint
Fixed Joint
A region in which people share one or more cultural traits is often referred to as a cultural region. This can include aspects such as language, religion, customs, traditions, and beliefs that are common among the people living in that specific area. Cultural regions help define the identity and characteristics of a particular group of people.
It is called an articulation, or joint.
You have more than one. The bones that are nearest to the arm are called carpal bones (en exist of the scyphoid, pisiform, triquetrum...), the ones that form the parm are calle metacarpals and the bones in the fingers are called phalanges.
sectionalism