Ridge: spine, five animals, spine, spine, dog spine, spinal cord, waist, spondylitis, dragon spine, spine, vertebrate, spine, invertebrate, back, roof, spine, spine, neck spine, spinal nerve, high-pressure spine, spine, back, spine, spine, spine, spine, spine, spine.
The basic meaning of the ridge:
The middle bone of human and animal backs: the spine. Spinal cord. Spine. Backbone. Come back. Vertebrates. The middle uplift: the ridge. The roof. Spine.