Answer:
Both bony fishes and cartilaginous fishes have Skeletons made of bones.
The formal region is superior (proximal) to the crural region.
Our body is divided into different regions. The term Proximal refers to the closer point of attachment to body's main part. Thigh is the femoral region of the body. An example is that, knee is proximal to feet. The femoral region is also proximal to plantar region.
This can be helpful to treat tumors because tumors grow at a rapid rate and they are "out of control". By inhibiting the mitosis production, the tumor cells can also stop growing.