in the bone marrow, blood cells are created. Blood is part of the circulatory system, therefore it does have a deep connection with the skeletal system.
The veins and arteries are able to wrap tightly around the skeleton, so they will not dislodge.
Plants do not have the skeletal system but they have the circulatory system.
because the skeletal tissue makes blood cells an gets rid of the old ones
it keeps it functioning