Fig. 6-1A. Gasser, 1975.
Keywords: area of rhombencoel (fourth ventricle), auricular hillock on pharyngeal arch 2, cervical sinus, external features, foot plate, frontonasal area, hand plate, heart prominence, lateral nasal elevation, lens vesicle, liver prominence, mammary ridge, mandibular prominence of pharyngeal arch 1, maxillary prominence of pharyngeal arch 1, maxillonasal groove, medial nasal elevation, mesencephalic area, metencephalic area, myelencephalic area, nasal pit, opercular fold, optic cup, pharyngeal arch 3, pharyngeal arch 4, pharyngeal groove 1, stomodeum, tail bud, umbilical cord, urogenital fold
Source: The Virtual Human Embryo.