File:Streeter1957 stage 19 plate01.jpg

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Plate 1. Photographs of three embryos belonging to horizon xix

Comparing specimens of earlier age groups with those now being considered, it is seen that the trunk region is beginning to straighten out and the cervical angle is less acute. The coalescence of parts in the branchial region has altered the appearance of the external ear, and the hillocks are less conspicuous. The axes of the arms are almost at right angles to the dorsal line of the body of the embryo. x4.

Figs. 35-37 No. 8092.

Figs. 38-40 No. 6824.

Figs. 41-43 No. 4501.

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Links: 1 Graph Embryos 11-23 | 4 Eye and optic nerve 19-23 | Plate 1 - Cornea | Plate 2 - Hypophysis


Streeter GL. Developmental Horizons In Human Embryos Description Or Age Groups XIX, XX, XXI, XXII, And XXIII, Being The Fifth Issue Of A Survey Of The Carnegie Collection. (1957) Carnegie Instn. Wash. Publ. 611, Contrib. Embryol., 36: 167-196.

Cite this page: Hill, M.A. (2024, April 15) Embryology Streeter1957 stage 19 plate01.jpg. Retrieved from

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