please explain something. From the Genesis story, Eve was supposedly created from one of Adam's ribs. He would have had a bone/skeletal structure.
I hear you and I have wondered the same.
But Adam was created outside of the garden, and then brought INTO the garden. Made from the dust of the earth. So he had a form, but it was not this one that was limited to the physical; he was not trapped within it. Meaning he could move in and out of the spiritual. (like the angels can; like Christ can - after He rose; and like we will be able to once we are 'changed' to be like Him)
Hope that helps you to be able to get a sense of this a bit better. I am sorry that I do not know enough to explain better. I'll think and ask and try if I can.
Peace to you,