Umm–yeah. Respect for the body of a dead person IS important, because at the Resurrection, we get 'em back (but glorified, in better condition, and with abilities we don’t have in this life. And in my case, I hope younger looking and a few pounds lighter, and with hair my own color instead of out of a bottle–LOL!)
Also, our bodies are temples of the Holy Spirit in this life. Desecrating a dead body would be akin to desecrating a church, in other words.
When a body is completely destroyed (e.g., explosion, nuclear war) God CAN reassemble a new body at the Resurrection that would be that person’s body, but we’re not supposed to be doing anything other than treating a body with respect. This does not preclude burial, cremation, or the donation of organs, but all of these must be done consistent with Church teachings.