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UNSW Embryology

Endocrine Development Stage 22

© Dr Mark Hill (2007)

Acknowledgements

Introduction

By stage 22 thre are now visible many components of the endocrine system. Note the appearance and position of the glands within the embryo. In particular, the now more mature Thyroid and the more structured Pituitary.

Both these and other endocrine glands of this stage can be seen in more detail on the Selected Stage 22 page.

Stage 22

List of serial section images containing endocrine components.

A6: Thalamus/hypothalamus.

B2: Neurohyophysis and adenohypophysis. Remnant of Rathke's pouch (residual lumen) in adenohypophysis.

B3: Adenohypophysis.

C3: Glottic region with cricoid cartilage and descending process of thyroid cartilage laterally.

C4: Section damaged, but shows thyroid gland lateral to trachea.

C5: Thyroidgland.

Dl: Thymus gland.

E6: R,L adrenal glands under diaphragm.

E7: Large adrenal glands.

Fl: Adrenal glands. R. Kidney. Autonomic ganglia (partly the adrenal medulla precursors).

F2: Kidneys (note retroperitoneal location). Cortex. Medulla. L. Adrenal gland.

Glossary of Terms

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S |T | U | V | W | X | Y | Z

Quick Links

Endocrine Introduction | Abnormalities | Stage 13/14 Embryo | Stage 22 Embryo | Selected Sections Stage 22 Embryo | Abnormal Endocrine Development| Overview Pituitary Development | Overview Thyroid Development | Overview Adrenal Development | Overview of Pancreas Development See also GIT Notes- Pancreas |

UNSW Embryology ISBN: 978 0 7334 2436 6

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