File:Foster113.jpg

Fig. 113. Figures shewing the early changes in the form of the human head

From Quain's Anatomy.

• A. Head of an embryo of about four weeks. (After Allen Thomson.)
• B. Head of an embryo of about six weeks. (After Ecker.)
• C. Head of an embryo of about nine weeks.

1. mandibular arch ; 1'. persistent part of hyomandibular cleft ; a. auditory vesicle.

Reference

Foster, M., Balfour, F. M., Sedgwick, A., & Heape, W. (1883). The Elements of Embryology. (2nd ed.). London: Macmillan and Co.

Volume 1 - The History of the Chick: Egg structure and incubation beginning | Summary whole incubation | First day | Second day - first half | Second day - second half | Third day | Fourth day | Fifth day | Sixth day to incubation end | Figures 1

Volume 2 - The History of the Mammalian Embryo: General Development | Embryonic Membranes and Yolk-Sac | Organs from Epiblast | Organs from Mesoblast | Alimentary Canal | Appendix | Figures 2

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