Of course there's integration, not isolaion, of every sense. See how long you can stand on one leg, then close your eyes and repeat the experiment. Then switch legs.
Nothing in our body, muscle, organ, gland, etc. acts alone. We live in a dynamic world constantly experiencing stressors.
Yes. Fortunately no one is manufacturing hearts too weak to drive the legs they're connected to, or feet with an imedance too high for industry-standard legs.
Tim