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| ==Stage 13==
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| B1: Dorsal portion of hypopharyngeal eminence. Rathke's pouch derived from ectoderm anterior to the buccopharyngeal membrane ( rudimentary adenohypophysis).
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| B2: Rathke's pouch. Thyroid rudiment (cords) arrowed dark spots near midline.
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| B3: Rudimentary thyroid ventral to aortic sac (also seen in B2, ventral to the hypopharyngeal eminence).
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| G7: (Close to midline in head region). Forebrain, midbrain, hindbrain (with thin roof). Arrowed Rathke's pouch. Floor of pharynx with foramen caecum (the tongue has not yet formed).
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| ==Stage 22==
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| List of serial section images containing endocrine components.
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| A6: Thalamus/hypothalamus.
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| B2: Neurohyophysis and adenohypophysis. Remnant of Rathke's pouch (residual lumen) in adenohypophysis.
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| B3: Adenohypophysis.
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| C3: Glottic region with cricoid cartilage and descending process of thyroid cartilage laterally.
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| C4: Section damaged, but shows thyroid gland lateral to trachea.
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| C5: Thyroidgland.
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| Dl: Thymus gland.
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| E6: R,L adrenal glands under diaphragm.
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| E7: Large adrenal glands.
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| Fl: Adrenal glands. R. Kidney. Autonomic ganglia (partly the adrenal medulla precursors).
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| F2: Kidneys (note retroperitoneal location). Cortex. Medulla. L. Adrenal gland.
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