The evolution of man: a popular exposition of the principal points of human ontogeny and phylogene . Fig. 289.—Tissue of the nails (flattened epithelium): a-e, cells of theupper strata ; /, g, cells of the lower strata. Fig. 290.—Tissue of the covering of the small intestine (columnarepithelium) : a, side view of thi-ee cells (with thicker, porous borders) ; h,surface view of four cells. (After Frey.) hairs, skin-glands, etc., arise from the skin-sensory layer.(Cf Table XXIX., p. 232.) The inner covering of the intes-tinal tube and of its intestinal glands originates, on theother hand, from th
The evolution of man: a popular exposition of the principal points of human ontogeny and phylogene . Fig. 289.—Tissue of the nails (flattened epithelium): a-e, cells of theupper strata ; /, g, cells of the lower strata. Fig. 290.—Tissue of the covering of the small intestine (columnarepithelium) : a, side view of thi-ee cells (with thicker, porous borders) ; h,surface view of four cells. (After Frey.) hairs, skin-glands, etc., arise from the skin-sensory layer.(Cf Table XXIX., p. 232.) The inner covering of the intes-tinal tube and of its intestinal glands originates, on theother hand, from the intestinal-glandular layer (Fig. 290). TISSUES. 363 Connective tissue (connedivum) must be regarded asforming, in order of phylogenetic age, the second maingroup of tissues. This is morphologically characterized bythe intercellular substance, which develops between the
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Keywords: ., bookcentury1800, booksubjectembryologyhu, booksubjecthumanbeings
