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educate me please



Every day with the Moveable Museum I visit approximately 120 students (mostly 2nd & 4th graders)
 
With increasing regularity the following question arises.
 
Did dinosaurs have knees?     
( When a 7 year old asks this you should add on ..... like mine.   Which implies to me a kneecap/patella type knee bone.)
 
The mounts at AMNH don't show patellas, but could they?  Do any sauropsids have a "knee" in this sense?  or is it strictly a synapsid feature?
 
please advise.
 
and thanks in advance.
 
Jenny Lando
Assistant Coordinator
Moveable Museum/Paleontology of Dinosaurs
Education Department
American Museum of Natural History
CPW @ 79th Street
NYC NY 10024
mailto:jenny@amnh.org
212-769-5189
212-769-5329 (fax)
http://www.amnh.org