What are gravid proglottids and their role in the life cycle of certain organisms?
Understand the Problem
The question seems to discuss the biological term 'gravid proglottids' within the context of a certain organism's anatomy and reproductive strategies. It focuses on the characteristics of these proglottids, their function in the organism's life cycle, and how they are expelled from the host.
Answer
Gravid proglottids transfer fertilized eggs to the environment via feces, supporting the life cycle of tapeworms.
Gravid proglottids are the oldest segments of a tapeworm containing branched uteri packed with fertilized eggs. These detach from the tapeworm and are passed out with the host's feces, aiding in the transfer of embryos to a secondary host and maintaining the size of the strobila.
Answer for screen readers
Gravid proglottids are the oldest segments of a tapeworm containing branched uteri packed with fertilized eggs. These detach from the tapeworm and are passed out with the host's feces, aiding in the transfer of embryos to a secondary host and maintaining the size of the strobila.
More Information
Gravid proglottids play a crucial role in maintaining the tapeworm's life cycle by releasing thousands of eggs into the environment, increasing the likelihood that a secondary host will consume the eggs and continue the cycle.
Tips
A common mistake is to misunderstand the process of apolysis and its significance in releasing embryos and regulating the size of the strobila.
Sources
- DPDx - Taeniasis - CDC - cdc.gov
- Helminths: Structure, Classification, Growth, and Development - NCBI - ncbi.nlm.nih.gov
- Taenia Solium (Pork Tapeworm) Infection and Cysticercosis - merckmanuals.com
