Path followed:
1. Is the fault in the components that perform any physical action?
Answer: Yes
2. Is the fault in components that move?
Answer: Yes
3. Is the fault
in components that make the mechanism move?
Answer: No
4. Does the damaged component need to be replaced before deployment?
Answer: No
5. Can the replaced component be removed?
Answer: Yes
4) Planarian, Planariidae
Planarians can be found in freshwater under rocks and debris. They are bilateral and sensitive to the light (ÒPlanariaÓ). They have the remarkable capability of regenerating multiple, equal, new planarian when cut into various pieces.
Planarians have cells that are similar to embryonic stem cells in humans. Embryonic stem cells have the ability to differentiate into whatever type of cell the body needs. The large amount of cells in the Planarian help the animal regrow its body into a new, identical, normal looking planarian. Whenever it is cut into pieces a blastema will begin to form at the site of the wound. The blastema houses whitish cells that are in the embryonic-like state (ÒPlanaria: A Window on RegenerationÓ). These cells will start multiplying and differentiating into tissues, bones, nerves, etc. to form the missing body part. Once the planarian has regrown its body part the blastema will disappear.
“Planaria.” Psychology. George Fox University, 2014. Web. 5 Nov. 2014
http://www.georgefox.edu/academics/undergrad/departments/psychology/ckoch/research/planimal.html
“Planaria: A Window on Regeneration.” Microscope Imaging Station. Exploratorium, 2015. Web. 5 Nov. 2014.
http://www.exploratorium.edu/imaging-station/research/planaria/story_planaria.pdf
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