In X-Men Origins-Wolverine,Logan had some weird claws at the beginning of the movie?

I was watching X-Men Origins-Wolverine,and at the beginning of the movie,Logan had claws coming from his hands. But they weren't his metal claws,because they injected metal claws later in the movie. Does anyone know what does no-metal claws were?
Update: If they are bones,are they normal bones that every person has and he is just able to slide them out,or are those extra bones,that only he has?
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