File:Bonnot1906 fig03.jpg

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Fig. 3. From a photograph of the right view of the model

On this side, the lower part of the body wall is not seen as on the left side, but has been dissected out to the mid-sagittal plane, giving a side view of the spinal cord, notochord, the descending aorta with its branches, and the pelvic viscera.


Explanation (in addition to letters shown in Fig. 2): a‘ right aortic arch. al allantois. b Wolffian duet. ca caudal artery. cl cloaca. d duodenum. ha hypogastrie artery. i intestine. n notochord. o gall bladder. r rectum. ra right auricle. rv right ventricle. sc spinal cord. sv sinus venosus. u ureter. Its T-shaped upper extremity, forming the anlage of the permanent kidney, is almost entirely hidden by the hypogastric artery. up urinogenital papilla. vv vitelline (omphalomesenteric) vein.

A ascending aorta.

a dorsal aorta.

a‘ left aortic arch.

ac anterior cardinal vein (sinus-like dilatation).

c caecum, not marked externally, though its cavity is distinct internally.

co colon.

d ductus Cuvier.

hl hind limb.

l lung.

L liver.

la left auricle.

lv left ventricle.

m mesentery.

pa posterior cardinal vein.

ph pharynx.

s somite (external surface).

so anlage of sexual gland.

sc origin of subclavian artery.

sr suprarenal body (slightly visible).

ta tail.

th thymus, including the main gland and also the smaller “nodulus thymicus”.

tl lateral anlage of the thyroid gland, located between the fourth and fifth branehial arterial arches.

tm, median thyroid anlage.

u umbilical vein.

w Wolffian body.

x quadrangular window cut through the thick-walled great omentum into the bursa omentalis. The anlage of the imperfectly differentiated spleen lies in the oiuental wall just behind this window. Internal to the omentum lies the stomach (visible through the window in the original model, though not in the photograph).

ys yolk stalk, out near attachment to intestinal loop.

Stage 16 Links: Week 6 | Head | Lecture - Limb | Lecture - Gastrointestinal | Lecture - Head Development | Science Practical - Gastrointestinal | Science Practical - Head | Carnegie Embryos | Category:Carnegie Stage 16 | Week 6 | Next Stage 17
  Historic Papers: 1906 | 1908 | 1948 stages 15-18

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Bonnet E. and Severs R. On the structure of a human embryo eleven millimeters in length. (1906) Anat. Anz., 29: 452-459.

Cite this page: Hill, M.A. (2024, June 20) Embryology Bonnot1906 fig03.jpg. Retrieved from

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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