How do salivary glands develop in general?

All salivary glands develop from epithelial outgrowths from the oral cavity lining. These structures invade surrounding tissue, undergo branching morphogenesis, and eventually form the ductal system and secretory acini.

When do the parotid glands develop and from what tissue?

The parotid glands develop during the fifth week of embryonic life. They originate as ectodermal furrows from the cheek at the angle of the stomodeum (primitive mouth).

What is the developmental origin and timing of the submandibular glands?

The submandibular glands arise in the sixth week as endodermal outgrowths from the floor of the stomodeum. They grow posteriorly near the developing tongue to form their duct.

How do the sublingual glands differ in development from other major salivary glands?

The sublingual glands develop later (in the eighth week) and from multiple endodermal outgrowths rather than a single cord. Each typically forms its own duct opening on the sublingual fold.

What are minor salivary glands and how do they develop?

Minor salivary glands are small, scattered glands throughout the oral mucosa (except gingivae). They develop similarly to major glands but are unbranched or minimally branched and open directly onto the mucosal surface.

What structures form from the surrounding mesoderm during salivary gland development?

The connective tissue capsule and septae of salivary glands arise from the surrounding mesoderm. This supportive framework develops as the epithelial cords invade the mesenchyme.

Salivary Glands Development – Parotid to Sublingual