Breadcrumb Home Dental Hygiene DHYG 113 DHYG 113: Oral Histology and Embryology Download as PDF Program Dental Hygiene Credits 2.0 This course is the study of the microscopic anatomy of the oral tissues and embryonic development of the face, neck and oral cavity and the underlying relationship of the structures. Prerequisites DENT 116, DHYG 134, DHYG 209 Semester Offered Spring