. A laboratory manual and text-book of embryology. Embryology. CHROMAFFIN BODIES; SUPRARENAL GLAND 367 The Suprarenal Gland is developed from chromaffin tissue which becomes its medulla, and from mesodermal tissue which gives rise to its cortex. In an embryo of 6 mm. the anlage of the cortex is present, according to Soulie, and is derived from a thickening of the ccelomic epithelium. At 8 mm. the glands are definite organs and at 9 mm. their vascular structure is evident. The cellular elements of the cortex are at first larger than the chromaffin cells which give rise sy sy. Fig. 349.—Transver
. A laboratory manual and text-book of embryology. Embryology. CHROMAFFIN BODIES; SUPRARENAL GLAND 367 The Suprarenal Gland is developed from chromaffin tissue which becomes its medulla, and from mesodermal tissue which gives rise to its cortex. In an embryo of 6 mm. the anlage of the cortex is present, according to Soulie, and is derived from a thickening of the ccelomic epithelium. At 8 mm. the glands are definite organs and at 9 mm. their vascular structure is evident. The cellular elements of the cortex are at first larger than the chromaffin cells which give rise sy sy. Fig. 349.—Transverse section through right suprarenal gland of a mm. embryo (after T. H. Bryce). sy, sympathetic cells; sy', groups of cells extending from the sympathetic into the suprarenal gland; cap, capsule of gland; a, aorta. to the medulla. The anlages of the glands form projections in the dorsal wall of the ccelom between the mesonephros and mesentery (Figs. 214 and 225). The chromaffin cells of the medulla are derived from the cceliac plexus of the sympathetic system. In embryos of 15 to 19 mm. (Fig. 349) masses of these cells begin to migrate from the median side of the suprarenal anlage to a central position, and later surround the central vein which is present in embryos of 23 mm. The primitive chromaffin cells are small and stain intensely. They con- tinue their immigration until after birth. The differentiation of the cortex into. 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 Prentiss, Charles William, 1874-1915. Philadelphia, London, W. B. Saunders
Size: 1633px × 1529px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectembryology, bookyear1
