Isilevu

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Isilevu okanye ummandla wokucamngca yindawo apha ebusweni ngezantsi komlebe osezantsi ikwaquka indawo eveleleyo.[1] Ithanda ukuba ncinane yaye ibe ngqukuva kubantu basetyhini, ngelixa iba nkulu de ibe buxande emadodeni. Yenziwa ziintlafuno ezingezantsi. Ebantwini kuneentlobo eziliqela zemilo zezilevu, umzekelo isilevu esinefotho. 

In human evolution, the chin is a cladistic apomorphy, partially defining anatomically modern humans as distinct from archaic forms. Non-human anthropoid apes have a simian shelf for example. Elephants are the only other animals considered to display such a feature,[2] although this leads to debate over the use of the term.[3]

References[tshintsha | edit source]

  1. "Full Definition of chin". Merriam-Webster Dictionary. http://www.merriam-webster.com/dictionary/chin. Retrieved 2015-09-22.
  2. Enlow, Donald H. (1982) Handbook of facial growth Philadelphia: Saunders p. 283 ISBN 0721633862 "In the human mandible, a prominent chin marks this region, a distinctive feature that characterizes the face of modern man (and also, for reasons yet to be studied, the elephant)." 
  3. Schwartz, Jeffrey H. (2000) "The human chin revisited: what is it and who has it?" Journal of Human Evolution 38 (3): 402 PMID 10683306 doi:10.1006/jhev.1999.0339 "When humans and elephants can both be described as having chins, it is probably time to reconsider the applicability of the term."