Template:Congdon1922 table1: Difference between revisions
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| colspan=4|(Time of establishment of first arch; estimated average length 1.3 mm.; 23d day of development) | | colspan=4|(Time of establishment of first arch; estimated average length 1.3 mm.; 23d day of development) | ||
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| 1.3 | | 1.3 |
Revision as of 11:56, 22 January 2020
Table 1. Showing correlation of size of embryos and development of the aortic-arch system. | |||
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Embryo No. | Length in mm. | Arches present. | Characteristic features. |
(Time of establishment of first arch; estimated average length 1.3 mm.; 23d day of development) | |||
1878 | 1.3 | I | Slightly plexiform. Presomite stage |
1201 | 2 | I | |
391 | 2 | I | 7 somites |
470 | 4 | I | Neuropores open; 14 to 16 somites |
2053 | 3 | I; II beginning | Anterior neuropore closed; 20 somites; transverse anastomoses between primitive aortae |
Template:CE1201b | 3 | I. II | Earlier mandibular aitery; paired longitudinal neural arteries; |
836 | 4 | II, III | no ventral tract on cord |
(Just before establishment of fourth arch; estimated average length 4 mm.; 31st day of development) | |||
826 | 5 | III, IV | Earlier mandibular and hyoid arteries |
1075 | 6 | III, IV | Subclavian |
588 | 4 | III, IV | Earlier mandibular and hyoid arteries |
873 | 6 | III, IV | Ventral arterial tract on cord |
988 | 6 | III, IV | |
1380 | 4 | III, IV, pulmonary arches almost complete | |
2841 | 4 | III, IV; one so-called fifth arch; pulmonary almost complete | Early formation of basilar artery |
(Just before completion of pulmonary arch; estimated average length 6 mm.; 36th day of development) | |||
810 | 5 | III, IV, and pulmonary arches | Late stage in formation of basilar artery, Splitting of aortic sac distinct. Unpaired aorta complete |
1354 | 6 | III, IV, and pulmonaiy arches | |
617 | 7 | III, IV, two so-called fifth arches, and pulmonary arches | Subclavian artery surrounded by brachial plexus. Splitting of sac well marked. Islands at end of basilar artery |
792 | 8 | III, IV, and pulmonary arches | Pulmonary and IV arches widely separated below |
1121 | 11 | III, IV, and pulmonary arches | Right pulmonary artery small; basilar rounded; IV and pulmonary still farther apart |
721 | 9 | III, IV, and pulmonary arches | Cervical segmental arteries becoming interrupted |
163 | 9 | III, IV, and pulmonary arches | Anastomoses of cervical segmental arteries to form the vertebral artery are nearly complete |
(Time of interruption of pulmonary arch and of branchial period; estimated average length 12 mm 45th day of development) | |||
1771 | 13 | III, IV, left pulmonary and remnant of right pulmonary arch | |
544 | 10 | Vertebral artery complete; identity of arches disappearing; beginning of period of rapid descent of heart and arteries | |
940 | 14 | Definitive aortic arch just taking form. Right dorsal aorta between III and IV interrupted. Remnants still distinguishable. Main pulmonary channel from heart to aorta nearly straight | |
1909 | 15 | Common carotid elongated | |
492 | 16 | Right dorsal aorta distal to IV patent but slender | |
Template:CE74 | 16 | End of period of descent. Definitive aortic arch has curve of large radius. Short segment of right dorsal aorta distal to subclavian drawn out in slender thread | |
End of period of rapid descent of heart and arteries; estimated average length 18 mm.; 50th day of development) | |||
1390 | 18 | Definitive aortic arch sharply bent | |
460 | 20 | Summit of definitive aortic arch at superior thoracic aperture | |
2937 | 24 | Sternal bands in contact through most of their length | |
886 | 43 | Origin of right and left pulmonaiy" branches in contact through most of their length | |
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. |
Congdon (1922) Table 1 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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