. Elements of histology. Histology. Fibrous Coxnective Tissues. 55 contracted by darkness, on being exposed to sunlight they again return to tlie passive state. Tlie contrac- tion of the pigment cells is under the direct influence of the nervous system (Lister). Pouchet proved that the contractility of the pigment cells of the skin of certain fishes is intiuenced as a reflex action by the stimulation of the retina by light. 45. Fat cells.—Fat cells in the ripe and fully-formed state are spherical, large vesicles, each. Fig. 40.—From a Preparation of the Omentum of Guiuea-pig. {Atlas.) a, Arter
. Elements of histology. Histology. Fibrous Coxnective Tissues. 55 contracted by darkness, on being exposed to sunlight they again return to tlie passive state. Tlie contrac- tion of the pigment cells is under the direct influence of the nervous system (Lister). Pouchet proved that the contractility of the pigment cells of the skin of certain fishes is intiuenced as a reflex action by the stimulation of the retina by light. 45. Fat cells.—Fat cells in the ripe and fully-formed state are spherical, large vesicles, each. Fig. 40.—From a Preparation of the Omentum of Guiuea-pig. {Atlas.) a, Artery ; v, vein ; c, young capillary lilooil-vesriel; d, fat ceils?. consisting {a) of a thin protoplasmic membrane, which at one point includes an oval nucleus flattened from side to side, and (/>) of a substance, which is a fat globule filling the cavity of the vesicle (Fig. 40). These fat cells are collected together by fibrous connective tissue into smaller or larger groups, which in their turn form lobules; these again form by means of thicker masses of fibrous connective-tissue lohes, and these are finally arranged as continuous masses. Each group and lobule has its afferent arteriole, one or two. 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 original Klein, E. (Edward), 1844-1925; Edkins, John Sydney, b. 1865. Philadelphia : Lea Brothers
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