A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . Fia. 726.—Cross-section of a Completely Contracted HumanHeart, at the Level of the Lower and Middle Third. (Accordingto Krehl.) the outer wall of the right ventricle is so largely madeup of fibers coming from the left that the formerappears in sections of the heart like a cleft or pocketin the wall of the latter (see Fig. 726). Schemat-ically, the fibers may be described as falling into anumber of more or less well-defined groups accordingto the general direction o
A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . Fia. 726.—Cross-section of a Completely Contracted HumanHeart, at the Level of the Lower and Middle Third. (Accordingto Krehl.) the outer wall of the right ventricle is so largely madeup of fibers coming from the left that the formerappears in sections of the heart like a cleft or pocketin the wall of the latter (see Fig. 726). Schemat-ically, the fibers may be described as falling into anumber of more or less well-defined groups accordingto the general direction of their course. The super-ficial oblique fibers constitute the first of these Fig. 727,—Intermediate Layer of Circular Fibers of the LeftVentricle. The outer and inner fibers have been removed, and theoutlines of the entire heart schematically indicated. (Accordingto Krchl.) They take their origin in the fibrous rings at the baseof heart and have a general trend obliquely down-ward and to the left. The)^ form a thin, superficialstratum on the wall of the right ventricle, but onthe left side they increase greatly in number, and onreaching the apex many of them turn in to form the 143 Blood, Circulation of REFERENCE HAXDBOOK OF THE MEDICAL SCIENCES ?whorl, whence they ascend on the inner surface toterminate in the papillary muscles and chordaetendineae or to pass all the way up to the auriculo-ventricular ring. Mall divides these superficialfibers into two groups, the superficial bulbospiral andthe superficial sinospiral fibers. Between the innerand outer layers thus formed, fibers with a moretransverse or circular direction are met (Fig. 727).Some of these,
Size: 1571px × 1590px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbuckalbe, bookcentury1900, bookdecade1910, bookyear1913
