What are some structures implants in animals that serve a similar purpose?

In animals, structures such as antlers in deer and horns in cattle serve a similar purpose to implants by providing support for physical traits that enhance survival and reproduction. These structures are often used in mating displays or in combat for dominance. Additionally, beaks in birds and shells in mollusks function as protective adaptations that also aid in feeding. All these structures contribute to the animals' fitness in their respective environments.