What is the difference between a postorbital bar and fully enclosed eye sockets?     What is a bony ear tube?  Where is it located?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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What is the difference between a postorbital bar and fully enclosed eye sockets?

 

 

What is a bony ear tube?  Where is it located?

 

 

Which larger group of primates has bony ear tubes and which does not?

 

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Ans: Postorbital sockets are going in the all the primates which connects the frontal bone to the cheekbone. In primates, Postorbital sockets function to protect the orbital content from movements arising due to chewing muscles in temporal fossa. 

Eye sockets are the bony cavities which is also called as orbit. This orbit contain the eyeballs, muscles, nerves, ligaments, eyelashes etc and protect the eyes from injuries. 

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