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. 2019 Feb 10;234(5):700–708. doi: 10.1111/joa.12955

Figure 2.

Figure 2

Carnegie stages 18–19. (a) Human embryo 16 mm GL. Frontal section of the submandibular gland region. Azan staining. Primordium of the glandular stroma (S) and glandular parenchyma (P). CM, Meckel's cartilage; F, facial artery; G, parasympathetic submandibular gland; H, hypoglossal nerve; M, mylohyoid muscle; MN, mylohyoid nerve. (b) Magnification of (a). Arrow indicates nerve. F, facial artery; G, parasympathetic submandibular ganglion; M, mylohyoid muscle; P, primordium of the glandular parenchyma; S, primordium of the glandular stroma. (c) Human embryo 15 mm GL. Sagittal section of the submandibular gland region. Haematoxylin‐eosin staining. The primordium of the parenchyma (P) and stroma (S) of the SMG is located dorsal to parasympathetic submandibular ganglion (G). CM, Meckel's cartilage; GH, geniohyoid muscle; H, hypoglossal nerve; M, mylohyoid muscle. (d) Magnification of (c). Nervous branch (arrow) from the parasympathetic submandibular ganglion (G) that reaches the primordium of the glandular stroma (S). GH, geniohyoid muscle.