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...ntary bone and does not articulate with the sternum, and finally the human embryo, where the clavicle reaches its fullest development. ...absent; the remaining parts of the sternal bands were traced from a point 150 ^ anterior to the level of the first ribs back to the level of the ventral

...both the method of injection and that of direct observation of the living embryo in the same stage. ...h the growih of the entire wall of a vessel by cell-division in the living embryo and the formation of new vessels from the walls of old vessels; so that the

embryo (Heuser and Streeter, 1941 ; Hertig embryo extract prepared from 19- to 20day-old guinea pig embryos (Blandau and

namely, is there a separate germinal plasm set apart in the early embryo which used to refer to those germ cells which possibly segregate early in the embryo,

...e, it was nevertheless apparent that a venous injection of the body of the embryo was often produced, and the impression was gained that a communication exis ...om the mouth, reaching it by way of the Eustachian tube. Using, in the pig embryo, the heart as the mechanism for injecting the ink, extravasation from the c

the embryo of the mouse and rabbit is lower embryo, until the sprouting of the primary

...h he believed was the essential element in that it contained the preformed embryo in an intangible way. That is, the sperm animalcule of the ram contains a l ...rged capsule is soon formed which assumes the size and shape of the future embryo at the time of hatching (fig. 123). (See Tavolga, '50.) In the brook lampre

...tion of the interaction among the developing and growing organs within the embryo. The study of the growth influences of one embryonic . organ on another is ...and then continues without interruption until a free living larva or young embryo is formed. This then proceeds to grow and change until the adult structure

structural relationships between the developing embryo and the uterus. These comprise a succession of stages of placental metabolic demands of the developing embryo and fetus.

Washington, D. C. Published by the Carnegie Institution of Washington Carnegie Institution Of Washington, Publication No. 142

...p. 1391. Corner, G. W. 1915 Corpus luteum of pregnancy as it is in swine. Carnegie ...ctomjr in relation to the secondary sex characters of some domestic birds. Carnegie Inst. Washington, 243. Hegar, K. 1910 Studien zur Histogenese des Corpus lu

...presents the direction of the first outgrowth of the cochlear pouch of the embryo. As shown by Streeter ('07) for the human, this first growth of the cochlea and the acoustic and facial nerves in the human embryo. Am. Jour.

...) stated that there are present in the developing islet cells of the sheep embryo minute safranophile granules. These have since been observed by Laguesse (' Pankreas beim nienschlichen Embryo. Arch, mikros. Anat., Bd. 64. Kyrle, J. 1908 Ueber die Regenerationsvorgang

Mabel Bishop. The nervous system of a two-headed pig embryo. Twenty figures 379 150 150 150 113 125 125 138 138

Staff Member, Department of Embryology, Carnegie Institution Of Washington. Baltimore. Maryland 150

...yolk. This substance contains the principal foodstuffs for the developing embryo. Studies on the yolk of the hen’s egg indicate that it contains water (50 ...ter chapters that the animal pole marks the anterior end of the developing embryo and the vegetal pole marks the posterior end. There is also reason to belie

...that described for other hemopoietic organs, e.g., yolk-sac of 10-mm. pig embryo, 5 yolk-sac of mongoose embryos, 6 and red bone-marrow. 7 ...of mesenchymal 'angioblasts' in the living blastoderm of the two-day chick embryo grown in Locke's solution, by which the blood-vessel lumen forms. But these

-150 ...IC SAC AND ITS TOPOGRAPHICAL RELATION TO THE TRANSVERSE SINUS IN THE HUMAN EMBRYO

...ogy, With An Appendix On The Arteries And Veins In A Thirty Millimeter Pig Embryo== Ordinarily, the student is shown two dimensions of a piece of tissue or embryo, and left to imagine the third. Though whole mounts of chick embryos are ha

Aided by the Carnegie Institution. ...us structures in the wall of the cerebral vesicle and neural tube of a cat embryo undoubtedly relate to mitochondria.