Answered: Outline the developmental events in…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Related questions

Question

Outline the developmental events in adrenal, pituitary, and
thyroid gland development

Expert Solution

Step 1

From all three embryonic germ layers, the endocrine system emerges. The endocrine glands create the steroid hormones, such as and adrenal cortex and gonads originate from the mesoderm layer.

Step 2

The development of different organs of the body is originates from three germ layers. These are the ectoderm, endoderm, and mesoderm.

The origin of adrenal medulla from ectoderm and adrenal cortex from the mesoderm neural cells.
The origin of pituitary gland originates from 2 distinct areas of the ectoderm. The anterior pituitary gland comes from the oral ectoderm. Posterior pituitary gland originates from the neural ectoderm at the base of the hypothalamus.
The thyroid gland and its internal layer of thyroid cell from the endoderm. Lungs, pancreas, liver, colon, stomach, pharynx, bladder, bronchi, and trachea are also develop from the endoderm.