Human physiology . FIG. 88.— Injected lacteal vessels in twovilli of human intestine. (Teichmann.)100 diameters. The lacteals are filled Accordingwith white substance; the blood-vessels with dark, a, b, lacteals, singlein one villus, double in the other;r, horizontal lacteals, communicatingwith those of the villi; d, blood-vessels which consist of small arteriesand veins with capillary network IN TEENAL EESTITUT1VE SECEETIONS 267 protrusion of the villi. As shown in Fig. 87, they consist of aspecial epithelium which encloses a lymphoid tissue: in the centreof this is a lacteal, the wall of whi
Human physiology . FIG. 88.— Injected lacteal vessels in twovilli of human intestine. (Teichmann.)100 diameters. The lacteals are filled Accordingwith white substance; the blood-vessels with dark, a, b, lacteals, singlein one villus, double in the other;r, horizontal lacteals, communicatingwith those of the villi; d, blood-vessels which consist of small arteriesand veins with capillary network IN TEENAL EESTITUT1VE SECEETIONS 267 protrusion of the villi. As shown in Fig. 87, they consist of aspecial epithelium which encloses a lymphoid tissue: in the centreof this is a lacteal, the wall of which consists of simple epithelioidcells with wavy outlines, which in all probability have little stomata Tad. Tad FIG. 89.—Cross-section through villus: A, of dog ; B, of rabbit. (Heidenhain.) C, central , adenoid tissue ; E, epithelium with striated cuticle. or spaces at the junction of the cement substance. The centrallymphatic (which sometimes consists of two vessels joined at theend by a loop, as shown in Fig. 88) communicates with the sub-jacent intermuscular lymph plexus. The adenoid tissue of thevilli is generally more developed in carnivora than in herbivora,in which, on the other hand, the central lymphatic is much wider
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysiology, bookyear1
