Textbook of normal histology: including an account of the development of the tissues and of the organs . reak up into capillaries passing among the bundles of fibroustissue. The lymphatics are represented by the intercommunicating cell-spaces which connect with the larger lymph-cavities. The nerves terminating within the sclera constitute fine twigsgiven off from the larger trunks passing between the sclerotic andchoroid coats ; they break up into fibrillar which end as naked axis-cylinders between the bundles as an interfascicular plexus. THE CHOROID. The choroid consists of a connective-tiss
Textbook of normal histology: including an account of the development of the tissues and of the organs . reak up into capillaries passing among the bundles of fibroustissue. The lymphatics are represented by the intercommunicating cell-spaces which connect with the larger lymph-cavities. The nerves terminating within the sclera constitute fine twigsgiven off from the larger trunks passing between the sclerotic andchoroid coats ; they break up into fibrillar which end as naked axis-cylinders between the bundles as an interfascicular plexus. THE CHOROID. The choroid consists of a connective-tissue stroma supportingnumerous blood-vessels. Dependent largely upon the size andarrangement of the blood-vessels, certain layers are distinguished,these being, from without inward : i. The layer of choroidal stroma containing large blood-vessels. 2. The layer of dense capillary net-works—the choriocapillaris. 3. The homogeneous glassy lamina, or vitreous membrane. The stroma-layer, with its large blood-vessels, constitutes thegreater part of the choroid. Within a supporting tissue made up Fig. Section of human choroid : a, retinal pigment adhering to vitreous mem-brane (i); c, capillary ayer, or choriocapillaris ; d, e, large blood-vesselsof stroma-layer (f) ; g, lamina suprachoroidea; h, tissue of sclera. of closely united connective-tissue lamellae, elastic fibres, andbranched pigmented cells, the freely branching arterial and venoustrunks take their course, appearing as lighter-colored channels withinthe darker surrounding matrix. The blood-vessels and the stroma THE EYE AND ITS APPENDAGES. 343 are so intimately united that they constitute a layer of considerableconsistence. The largest vessels occupy the most superficialpart of the stratum, those next in size the middle, while the smallestapproach the capillary zone. The most conspicuous of the largesuperficial blood-channels are the four venae vorticosae, with theirwhorls of tributaries. These veins occupy positions
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Keywords: ., bookauthorpiersolgeorgeageorgea, bookcentury1800, bookdecade1890
