The proglottids of a tapeworm are almost entirely filled with organs that function in b) reproduction.
Proglottids are segments of a tapeworm that contain reproductive structures. As the tapeworm matures, new proglottids are produced in a chain, each filled with testes and ovaries for sexual reproduction. Once they are fertilized, the proglottids can detach and be expelled from the host, allowing for the tapeworm to spread its eggs into the environment.
While some organs in these segments may play minor roles in digestion and other functions, their primary purpose is reproductive. This adaptation is key to the life cycle of tapeworms, ensuring that they can reproduce effectively within their host.