| Embryo No.
|
Length in mm
|
Arches present
|
Characteristic features
|
| 1878
|
| 1201
|
| 391
|
| 470
|
| 2053
|
| 1201b
|
| 836
|
| Just before establishment of fourth arch; estimated average length 4 mm; 31st day of development
|
| 826
|
| 1075
|
| 588
|
| 873
|
| 988
|
| 1380
|
| 2841
|
| Just before completion of pulmonary arch; estimated average length 6 mm; 36th day of development
|
| 810
|
| 1354
|
| 617
|
| 792
|
| 1121
|
| 721
|
| 163
|
| Time of interruption of pulmonary arch and branchial period; estimated average length 12 mm; 45th day of development
|
| 1771
|
| 544
|
| 940
|
| 1909
|
| 492
|
| 74
|
| End of period of rapid descent of heart and arteries; estimated average length 18 mm; 50th day of development
|
| 1390
|
| 460
|
| 2937
|
| 886
|
| Estimates based on Keibel F. and Mall FP. Manual of Human Embryology II. (1912) J. B. Lippincott Company, Philadelphia. curve of length and age.
|
| Reference: Congdon ED. Transformation of the aortic-arch system during the development of the human embryo. (1922) Contrib. Embryol., Carnegie Inst. Wash. Publ 277, 14:47-110.
|
