1. Does the head of the first rib articulate with its own vertebral body only, its own and the one above or its own and the one below?
   
   
2. Does the tubercle of a rib articulate with its own transverse process, the transverse process above or the one below?
   
   
3. How do you classify the first costosternal (chondromanubrial) joint?
   
   

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