File:Foster129.jpg

Fig. 129. Transverse Section of the Head of a Fetal Sheep (16 mm in length) in the Region of the Hind-Brain

After Bottcher.

HB. the hind-brain. The section is somewhat oblique, hence while on the right side the connections of the recessus vestibuli R.L. and of the commencing vertical semicircular canal F.L., and of the ductus cochlearis CO., with the cavity of the primary otic vesicle are seen : on the left side, only the extreme end of the ductus cochlearis CC, and of the semicircular canal V.B. are shewn. Lying close to the inner side of the otic vesicle is seen the cochlear ganglion GC ; on the left side the auditory nerve G' and its connection N with the hind-brain are also shewn. Below the otic vesicle on either side lies the jugular vein.

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

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