We were able to get copies of Jarvis' x-rays and they are very interesting, so we wanted to share some with you.
The picture below is Jarvis' left hand, and you can see, there are three bones in his thumb. Both of his thumbs look like this. You may note, that in baby hands, there is significantly more cartilage and less bone. That's J's finger down in the bottom and you can clearly see his joints, Jarvis' have not solidified yet. You can see that his wrist is nearly all cartilage.
And oh my goodness, look at all that chub!!
Here's another view from the side.
And just as a point of reference, here's a random x-ray of a normal baby hand.
Interesting to look at for sure!