This is what it looks like inside a horse’s hoof. The top part of the hoof is the coronary corium which produces the most part of the hoof wall. Horn is what makes up a horse’s hoof capsule. Next, you can see the dermal or primary laminae which houses blood and nerves. Yes, there’s more in the hoof capsule then just a bone. The primary laminae is connected to the epidermal or secondary laminae, they are strongly bonded/glued together. The secondary layer is what you see on the hoof capsule in the picture below. It doesn't house blood and nerves, but rather attaches to the horn. This is how the hoof capsule is connected to the coffin bone, but it’s not as easy as it may look to separate the two, in a healthy hoof they have a very strong bond.
Left photo, this is a large part of the hoof capsule torn away from the coffin bone. Picture on right is a close up view of photo on left. Here you can see the grooves in between the secondary laminae, this is for the primary laminae to fit into each slot so the two can bond strongly together.
This is what it looks like directly underneath the sole and frog. If we flipped this over, you would see the sole and the frog.
This picture shows what is under the sole and frog. This is the sole and frog corium.