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==Fig. 1. Early Human Embryo Mammary Band==
==Fig. 1. Human Embryo 3.5 to 6 mm CRL==


In the very earliest embryos examined, 3-5 mm., 4-5 mm., 5-5 mm. and 6-0 mm., there were no signs of a developing nipple. In the latter three, the ectoderm surrounding the origins of the limb buds, and on the lateral walls of the trunk between them, displayed a mild differentiation into two layers of cells. This ectoderm has been referred to as the “ mammary band ” (Fig. 1 (a) ).
In the very earliest embryos examined, 3-5 mm., 4-5 mm., 5-5 mm. and 6-0 mm., there were no signs of a developing nipple. In the latter three, the ectoderm surrounding the origins of the limb buds, and on the lateral walls of the trunk between them, displayed a mild differentiation into two layers of cells. This ectoderm has been referred to as the “ mammary band ” (Fig. 1 (a) ).

Latest revision as of 10:18, 15 August 2018

Fig. 1. Human Embryo 3.5 to 6 mm CRL

In the very earliest embryos examined, 3-5 mm., 4-5 mm., 5-5 mm. and 6-0 mm., there were no signs of a developing nipple. In the latter three, the ectoderm surrounding the origins of the limb buds, and on the lateral walls of the trunk between them, displayed a mild differentiation into two layers of cells. This ectoderm has been referred to as the “ mammary band ” (Fig. 1 (a) ).

(A) The “ mammary band ” (darkened area) surrounds the limb buds and extends between them on the lateral wall of the trunk. (B) The mammary crest appealrs wilthin the mammary band area and is represented here as a b ack ine.

Reference

Hughes ES. Development of the mammary gland. (1950) Ann R Coll Surg Engl. 6(2):99-119. PMID 19309885



Cite this page: Hill, M.A. (2024, May 20) Embryology Hughes1950 fig01.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hughes1950_fig01.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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