Talk:Paper - The development of the heart in man

Study Embryos

1. Embryo 2W1, 3 mm in length (maximum).
2. Embryo S1, 6 mm in length (maximum).
3. Embryo B1, 8 mm in length (maximum).
4. Embryo M1, 9 mm in length (maximum).
5. Embryo S4, 12.5 mm in length (maximum).
6. Embryo B2, 13 mm in length (maximum).
7. Embryo 16 mm in length (maximum).
8. Embryo S3, 20 mm in length (maximum).
9. Embryo B3, 22 mm in length (maximum).
10. Embryo 30 mm in length (maximum).
11. Embryo E1, 28.5 mm in length (maximum).

All of these embryos showed good histological condition, and most of them almost perfect histological detail.

I am indebted to Prof. Symington for the embryos B1, B2, and B3, and to Prof. Peter Thompson and to Prof. Bryce respectively for the opportunity of examining and reconstructing from their sections the heart in the embryos 7 and 10 of the list.

No.	Embryo	Length (CRL) mm	Source
1	2W1	3
2	S1	6
3	B1	8	Prof. Symington
4	M1	9
5	S4	12.5
6	B2	13	Prof. Symington
7	Embryo 16 mm	16	Prof. Peter Thompson
8	S3	20
9	B3	22	Prof. Symington
10	Embryo 30 mm	30	Prof. Bryce
11	E1	28.5
Reference: Waterston D. The development of the heart in man. (1917) Trans. Roy. Soc. Edin., 7(2): 258-302.

No.	Embryo	Length (CRL) mm	Comment
1	2W1	3	27 somites Carnegie stage 12
2	S1	6	Carnegie stage 13
3	B1	8	Prof. Symington
4	M1	9
5	S4	12.5
6	B2	13	Prof. Symington
7	Embryo 16 mm	16	Prof. Peter Thompson
8	S3	20
9	B3	22	Prof. Symington
10	Embryo 30 mm	30	Prof. Bryce
11	E1	28.5
All of these embryos showed good histological condition, and most of them almost perfect histological detail. Note - table has been modified from the original article. Reference: Waterston D. The development of the heart in man. (1917) Trans. Roy. Soc. Edin., 7(2): 258-302.