. The elements of Embryology. Embryology. 170 THE THIRD DAY. [CHAP Small arteries to various parts of the body are now being given off by the aorta and its branches. The capillaries in which these end are gathered into veins which unite to form two main trunks on either side, the cardinal veins, anterior and posterior (Fig. 36, Fig. 58 Fig. 58. IT . ^... Diagram of the Venous Circulation on the Third Day. IT. Heart. J. Jugular or anterior cardinal vein. C. Inferior or posterior cardinal vein. Of. Vitelline vein. dc. Ductus Cuvieri. J" and C), which run parallel to the long axis of the bod
. The elements of Embryology. Embryology. 170 THE THIRD DAY. [CHAP Small arteries to various parts of the body are now being given off by the aorta and its branches. The capillaries in which these end are gathered into veins which unite to form two main trunks on either side, the cardinal veins, anterior and posterior (Fig. 36, Fig. 58 Fig. 58. IT . ^... Diagram of the Venous Circulation on the Third Day. IT. Heart. J. Jugular or anterior cardinal vein. C. Inferior or posterior cardinal vein. Of. Vitelline vein. dc. Ductus Cuvieri. J" and C), which run parallel to the long axis of the body in the upper part of the mesoblast, a little external to the mesoblastic somites. These veins, Avhich do not attain to any great importance till well on in the third day, unite opposite to the heart, on each side, into a short common trunk at right angles to themselves. The two short trunks thus formed, which bear the name of ductus Cuvieri (Fig. 36, Fig. 58, dc), running ventralwards and then transversely straight inwards towards the middle line fall into the sinus venosus. The two ductus Cuvieri pass from the heart to the body walls in a special horizontal mesentery, whose for- mation and function we shall return to in speaking of the formation of the pericardial cavity. The position of one of them is shewn in section in Fig. 59 B, dc. I. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Foster, M. (Michael), Sir, 1836-1907. London, MacMillan
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Keywords: ., bookautho, bookcentury1800, bookdecade1880, booksubjectembryology
