... where it meets the marsupial pouch and the cloacal orifice, forms from its fibers certain more specialized slips to serve as sphincters {sphincter marsupii and sphincter cloacae). A panniculus carnosus, ...

... times exceeds three on each side. A common sphincter muscle surrounds the anus and the urinogenital aperture, and in the females (except kangaroos) the anus lies so much within the urinogenital sinus that the arrangement may be described as cloacal. The scrotal sac containing the testes lies in ...

... and abdominal Viscera in a female foetus with cloacal ... f Anus surrounded by the sphincter ani. g. Vagina. h. Blind opening representing anus. ...

... bowel and urogenital sinus end in a common cloacal opening; later, separation between the bladder and urethra ... skin at margin of anus reflected; SE, external sphincter ; VHE, external or inferior hemorrhoidal vein; VHI, internal ...

... an historical review. 244 pp. 8°. Cincinnati, 1908. ---- Cloacal morphology in its relation to genito-urinarv and ... ix, 107-112.—SkUlern (R. H.) SPHENOID 786 SPHINCTERS Sphenoid sinus (Exploration of)—contd. A Pfahler (G. ...

... roof of the yolk-sac; and (4) the cloacal membrane. These elements form the epithelial linings of ... its floor is formed in part by the cloacal membrane. The cloaca is later divided, in the ...

... caudal end of the primitive streak forms the cloacal membrane. The extension of the mesoderm takes place ... and entoderm come into apposition and form the cloacal membrane. The blastoderm now consists of three layers, ...

... anal orifice, so as to form an immense cloacal cavity, the wall of which extends so far ... which expel the water it contains, through its cloacal orifice, at tolerably regular intervals (such as once, ...

... student to understand the subdivision of the primary cloacal chamber. As they refer to the female embryo, ... the sixth week. On each side of the cloacal slit outgrowths of skin and Fig. 34.—To ...

... canal being imperfect, the urethra imper- forate, or cloacal malformation present. Meckel has even made this law ... form of spurious hermaphroditism. To this malformation succeeds— Cloacal formation, junction of the orifice of the anus ...