Paper - Factors leading to the development of a joint between the manubrium and the mesosternum
|Embryology - 16 Dec 2019 Expand to Translate|
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Ashley GT. Factors leading to the development of a joint between the manubrium and the mesosternum. (1955) Thorax (1955), 10, 153-156.
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Factors leading to the Development of a Joint between the Manubrium and the Mesosternum
G. T. Ashley
The sternum, though present in some form in the vast majority of vertebrates and always more or less constant in its position, is, nevertheless, a bone which varies greatly both in its form and in its function. For example, it may be broad and flat and devoid of joints, as in the tortoise; or it may be long and narrow and composed of many segments, as in the cat.
Fig. 1. Photomicrographs (natural size) of stained sections of foetal sterna showing (A, B, C, D) the presence of a fibrous band (arrowed) across the sternum at the level of the second costal, cartilages, and (E, F) the absence of such a band. Foetal age is indicated in each case.
Fig. 2. Paramedian sagital section of a 28 mm human embryo to show the relation of the heart and pericardium to the overlying mesosternum.
Fig.3. Examples of hylobatean-type human sterna showing the manubrio-sternal joint (free A,B: synostosed C,D) at the narrowest part of the sternum, in each case opposite the third costal cartilages.
Cite this page: Hill, M.A. (2019, December 16) Embryology Paper - Factors leading to the development of a joint between the manubrium and the mesosternum. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Paper_-_Factors_leading_to_the_development_of_a_joint_between_the_manubrium_and_the_mesosternum
- © Dr Mark Hill 2019, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G