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Zone of fusion between the medial nasal and maxillary process

 # The zone of fusion between the medial nasal and maxillary process is referred to as which of the following? 
a. Cleft lip. 
b. Philtrum. 
c. Nasal fin. 
d. Maxillonasal process.



The correct answer is C. Nasal fin.

A lack of contact or fusion of the medial nasal and maxillary processes results in either a unilateral or bilateral cleft lip. The medial nasal process is called the philtrum. The epithelial coverings of the medial nasal and maxillary processes normally contact and create a zone of fusion termed the nasal fin. 

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