Zhongjianornis an enlarged, keeled breastbone in more advanced birds. However, later analysis of the anatomy of "Z. yangi" cast doubt on this interpretation of the bird as very primitive. Research published in 2012 found that some of the apparently primitive features were due to poor preservation of the bones, and that "Zhongjianornis" is more similar in anatomy to primitive euornitheans like "Chaoyangia" and "Schizooura". A phylogenetic analysis showed that a very primitive position in the bird family tree for "Z. yangi" is unlikely given current evidence. Zhongjianornis Zhongjianornis is a genus of beaked, pigeon-sized birds from the early Cretaceous period of
Anatomy for Beginners by medical students in some countries as part of their medical training. Formal dissection are performed slowly and take dozens of hours of dissection. "Anatomy for Beginners" performs quicker autopsy and also combines with demonstration of plastinated body parts and specimens to gives just a glimpse of the human anatomy. The individuals on whom the demonstration was performed had, before their death, enrolled on von Hagens’ body donor programme and consented to the use of their bodies for public education in anatomy, including public demonstration. Anatomy for Beginners Anatomy for Beginners is a television show created by Gunther von Hagens.