Archive image from page 844 of Cunningham's Text-book of anatomy (1914). Cunningham's Text-book of anatomy cunninghamstextb00cunn Year: 1914 ( VASCULAB TUNIC OF THE EYE. 811 layers, viz.: (a) the lamina suprachorioidea; (6) the proper tissue of the chorioid and (c) the lamina basalis (Fig. 681). Lamina basalis Lamina choriocapillaris Intermediate stratum I y Lamina vasculosa 'ls—Lamina suprachorioidea Sclera Sinus venosus sclene Circulus arteriosus major Conjunctival vessels Recurrent artery of chorioid Fig. 681.—Vertical Section of Chorioid and Inner Part of Sclera. The lamina suprachorio
Archive image from page 844 of Cunningham's Text-book of anatomy (1914). Cunningham's Text-book of anatomy cunninghamstextb00cunn Year: 1914 ( VASCULAB TUNIC OF THE EYE. 811 layers, viz.: (a) the lamina suprachorioidea; (6) the proper tissue of the chorioid and (c) the lamina basalis (Fig. 681). Lamina basalis Lamina choriocapillaris Intermediate stratum I y Lamina vasculosa 'ls—Lamina suprachorioidea Sclera Sinus venosus sclene Circulus arteriosus major Conjunctival vessels Recurrent artery of chorioid Fig. 681.—Vertical Section of Chorioid and Inner Part of Sclera. The lamina suprachorioidea resembles the lamina fusca of the sclera, and consists of a series of fine non-vascular lamellae, each containing a delicate network of elastic fibres, amongst which are stellate, pig- mented cells and amoe- boid cells. The spaces between the laminae are lined with endo- thelium, and together form the spatium peri- chorioideale, already referred to (p. 808). The proper tissue of the chorioid consists of blood - vessels and numerous pigmented cells, supported by con- nective tissue, elastic fibres, and some non- striped muscular fibres. Its outer part contains the larger blood-vessels, and is named the lamina vasculosa, while its inner portion is com- posed of a network of fine capillaries, and is termed the lamina choriocapillaris ; these two laminae are joined by a thin intermediate stratum. The arteries of the chorioid are de- rived from the short posterior ciliary vessels which pierce the sclera around the entrance of the optic nerve, and form a wide - meshed plexus in the lamina vasculosa. The circular muscular coats of the arteries are well developed, and lono-itudinal muscular fibres also are present in the larger branches. The veins,
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