1. Is the fault in the components that perform any physical action?]
Answer: No
2. Is the faulty component part of the mechanism’s body?
Answer: Yes
3. Is the faulty component in the structure of the mechanism?
Answer: Yes
4. Does the fault appear in components that provide rigidity to the mechanism?
Answer: No
5. Is the faulty component responsible for supporting other components?
Answer: Yes
6. Is the fault in critical components of the mechanism?
Answer: Yes
7. Does the faulty component control other parts of the mechanism?
Answer: No
116) Vityazicrinus petrachenkoi
This type of sea lily can be found in the deep parts of the Central Pacific Ocean (Nakano et al.). Sea lilies have the ability of regenerating their stalk if it was to get amputated in some way.
As long as the basal plate that the old stalk used to grow from is still intact the sea lily will be able to regenerate its stalk (Eleaume et al.). The basal plate is suspected to house the undifferentiated or specialized cells needed to regenerate the stalk. Once the stalk has been lost the cells will begin to proliferate and differentiate into the specific cells needed. They differentiate into the multiple columns and crenulars
in the regenerating stalk (Eleaume et al.). These columns and crenulars are connected by mutable collagenous tissue (MCT) which is collagenous fibers made from the differentiate cells as well (Eleaume et al.). In the center of the stalk is an elongated cavity lined with stereom made from specific cells from the basal plate. The cells will continue to proliferate and allow the stalk to grow taller. Once the stalk has fully regenerated the cells will stop proliferating in the basal plate.
Nakano, Hiroaki, Taku Hibino, Yuko Hara, Tatsuo Oji, and Shonan Amemiya. “Regrowth of the Stalk of the Sea Lily,
Metacrinus Rotundus (Echinodermata: Crinoidea).” Journal of Experimental Zoology Part A: Comparative Experimental Biology 301A.6 (2004): 464-71. Wiley Online Library. Web. 4 Jan. 2015.
http://onlinelibrary.wiley.com/doi/10.1002/jez.a.77/abstract
Eleaume, Marc, Michel Roux, and Nadia Ameziane. “A New Type of Stalk Articulation in the Sea Lily Genus Vityazicrinus (Echinodermata, Crinoidea) and Its Ontogeny.” Zoomorphology 133 (2014): 307-20. Deepdyve. Web. 4 Jan. 2015.
Recent Comments