Sarah's suggestions were repeated, and Miguel thought for a moment before bringing his leg back and holding it up a little. He bent it a little, back and forth, and all the joints flexed. The joints might be the best place. Then he spelled things out for Lyla, which would have taken a lot longer if Lyla wasn't as good as she was at predicting what he was trying to say.
"He says to try and get the internal scans from Tony's device. He can't be 100% spider, so he might have more human-like muscles, bones and joints instead of a sealed exo-skeleton that uses hydraulics to move his legs. If that's the case, a leg joint might have synovial fluid, or simply provide an easier location to draw blood samples. And he says you smell wonderful."