1. Is the fault in the components that perform any physical action?
Answer: Yes
2. Is the fault in components that move?
Answer: No
3. Is the fault in the mechanisms controls?
Answer: Yes
4. Is the fault in the components responsible for sending signals?
Answer: Yes
5. Is the fault only limited to non-sensory components?
Answer: Yes
6. Does the adaptation need to occur before deployment?
Answer: Yes
7. Is the fault comprised of several faults across the damaged component?
Answer: Yes
119) Chicken, Gallus gallus domesticus
Chickens can be found all over the world and are used for their meat and eggs. Avian chicks have been found to have the ability of regenerating their spinal cord while in the embryo if it was damaged in some way.
Soon after the spinal cord has been cut or damaged specialized cells migrate to the wound site and begin to proliferate. These cells include astrocytes, Schwann cells, and oligodendrocytes (Keirstead et al.). Astrocytes proliferate and differentiate into the glial cells that make up the neurons in the spinal cord. More astrocytes proliferate to create a connection from both sides of the wounded area. The Schwann cells create the myelin sheath around the neurons in the peripheral nervous system. Oligodendrocytes create myelin sheath around the neurons in the central nervous system (Keirstead et al.). Once the connection has been made across the gap and the myelin sheath has been added the cells will stop proliferating and migrate away from the wounded site.
Keirstead, Hans S., Jason K. Dyer, Gerald N. Sholomenko, John McGraw, Kerry R. Delaney, and John D. Steeves. “Axonal Regeneration and Physiological Activity Following Transection and Immunological Disruption of Myelin within the Hatchling Chick Spinal Cord.” The Journal of Neuroscience 15.10 (1995): 6963-974. The Journal of Neuroscience. Web. 6 Jan. 2015.
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