. Elements of histology. Histology. Body. 443 with the ends of the fibres of the sjinie lamelhi in tlie siUiires, or the rays of the so-called lens stars. In the lens of the newly-born child, the stars of both anterior and ])Osterior lamellae possess three such rays, while in the adidt each of these rays has secondary rays. Tn these rays there is a homogeneous thin layer of an albuminous cement substance ; a similar sub- stance in minute quantity is also present between the lamellve, and in it occur smaller or larger clefts and channels, which evidently carry the nutritious fluid for
. Elements of histology. Histology. Body. 443 with the ends of the fibres of the sjinie lamelhi in tlie siUiires, or the rays of the so-called lens stars. In the lens of the newly-born child, the stars of both anterior and ])Osterior lamellae possess three such rays, while in the adidt each of these rays has secondary rays. Tn these rays there is a homogeneous thin layer of an albuminous cement substance ; a similar sub- stance in minute quantity is also present between the lamellve, and in it occur smaller or larger clefts and channels, which evidently carry the nutritious fluid for the lens fibres. 431. (:2) The vitreous bo<ly is a fluid substance enclosed in a delicate hyaline capsuleâthe memhrana hyaloidea. This membrane, at tlie margin of the fossa patel- la ris of the vitreous bodyâ the fossa in wliich the lens is lodgedâand without covering this fossa, passes as the zonula ciliaris, or zonula Zinnii, or suspensory ligament of the lens, to tlie margin of the latter, to whicli it is firmly adhering. So it adheres also to the surface of the ciliary processes. The zonula Zinnii is hyaline and firm, and is strentjthened bv numbers of bundles of minute stifl' fibrils. Between the suspensoi y liga- ment of the lens, the margin of the lens and of the fossa patellaiis is a circular lymph space, called the canalis Petiti. Beneath tlie membrana hyaloidea are found iso- lated nucleated granular-looking cells (the sub-hyaloid cells of Ciaccio), possessed of amoeboid movement (Ivanofl). 432. The substance of the corpus vitreum appears. i ,:^'^>)^j â ^^)/ Ajj^ - - Fig. 2(iS.âFrom a Section through the Lens of Dog. (Atlus.) Sliciwing four lamellse ; in each the component lens filires are cut across ; they appear as flattened hexa"- u' 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 orig
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphiladelphialeabro
