. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. 462 THE VITREOUS HUMOR connective tissue. More recently, however, renewed observations by several authors have resulted in the deposition of the mesoderm from the chief role in the formation of the vitreous and the substitu- tion in it of the retina. At an early stage of development delicate protoplasmic processes may be seen projecting from the surface of the retinal layer into the cavity of the optic cup, these processes probably arising from those cells which will later form the Miiller's.
. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. 462 THE VITREOUS HUMOR connective tissue. More recently, however, renewed observations by several authors have resulted in the deposition of the mesoderm from the chief role in the formation of the vitreous and the substitu- tion in it of the retina. At an early stage of development delicate protoplasmic processes may be seen projecting from the surface of the retinal layer into the cavity of the optic cup, these processes probably arising from those cells which will later form the Miiller's. Fig. 277.—Transverse Section through the Ciliary Region of a Chick Embryo of Sixteen Days. ac, Anterior chamber of the eye; cj, conjunctiva; co, cornea; i, iris; I, lens; mc, ciliary muscle; rl, retinal layer of optic cup; sf, spaces of Fontana; si, suspensory ligament of the lens; v, vitreous humor.—(Angelucci.) (neuroglia) fibers of the retina. As development proceeds they in- crease in length, forming a dense and very fine fibrillar reticulum traversing the space between the lens and the retina and constituting the primary vitreous humor. The formation of the fibers is espe- cially active in the ciliary portion of the retina and it is probable that it is from some of the fibers developing in this region that the sus- pensory ligament of the lens (zonula Zinnii) (Fig. 277, si) is formed. 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 McMurrich, J. Playfair (James Playfair), 1859-1939. Philadelphia : P. Blakiston's son & co.
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