File:Keibel Mall 2 300.jpg

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Fig. 300. Dorsal views of the hepatic region

Fig. 300, model from a 4 mm. embryo (Harvard Collection, Series 714), X 66 diam.

ap.cor. d., ap. cor. s., right and left coronary appendages; c. pi., pleural part of the pleuroperitoneal cavity; c. per., peritoneal part of the pleuroperitoneal cavity; d. ch., common bile-duct; dia., diaphragm; for. ep., foramen epiploicum; I. cor., coronary ligament; 1. hep, d., I. hep. «., right and left hepatic lobes; mes., mesentery; oes., oesophagus; om. m., lesser omentum; pl. v. c, plica venae cavae; r. s., superior lateral recess of the peritoneal cavity; septum transversum; v.c, vena cava; ves. fel., gall-bladder; v. p., portal vein; v. um., umbilical vein.

In the 4 mm. embryo (Fig. 300), each of the lateral lobes of the liver is prolonged upward by an irregular mass of tissue, which nearlv fills the body cavity. Each mass is attached alone,' its ventral border to the septum transversum. and thus it separates the medial pleural part of the body cavity from the lateral peritoneal part. But superiorly these cavities connect with one another and open into the pericardial cavity, as already noted. The upward prolongations of the liver may be called the right and left coronary appendages. They are the anterior portions of the "Vorleber" of His, which were described in a 4 mm. embryo as containing a plexus of blood-vessels but no network of trabecular 16 They are certainly the ventral pillars bounding the pleuroperitoneal opening, first described by Uskow (1883) and later, for human embryos, by Swaen (1897). Their relation to the dorsal pillars, which have been called the suspensory ligaments of the Wolffian body, have been discussed in Chapter XIII.

Fig. 300 4 mm embryo | Fig. 301 9.4 mm embryo | Fig. 302 5 months' embryo

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Grosser O. Lewis FT. and McMurrich JP. The Development of the Digestive Tract and of the Organs of Respiration. (1912) chapter 17, vol. 2, in Keibel F. and Mall FP. Manual of Human Embryology II. (1912) J. B. Lippincott Company, Philadelphia.

Cite this page: Hill, M.A. (2024, April 21) Embryology Keibel Mall 2 300.jpg. Retrieved from

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