Abstract
The development of the upper limb bud occurs earlier than that of the lower one. The first appearance of upper limb buds is noted at stage 12 when the embryo is approximately 4 weeks of age and measures only 3.5 mm in length. Proliferating mesoblasts represent the primordium of the upper limb bud which is situated opposite the 5th–7th cervical somite.
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References
O’Rahilly R, Gardner E (1975) The timing and sequence of events in the development of the limbs in the human embryo. Anat Embryol (Berl) 148:1–23
Streeter GI (1951) Developmental horizons in human embryos. Carnegie Institution of Washington, Washington
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© 1990 Springer-Verlag Berlin Heidelberg
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Uhthoff, H.K. (1990). The Development of Limb Buds. In: The Embryology of the Human Locomotor System. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-75310-7_2
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DOI: https://doi.org/10.1007/978-3-642-75310-7_2
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-75312-1
Online ISBN: 978-3-642-75310-7
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