Human anatomy, including structure and development and practical considerations . manal glands, lodged chieHy within a zone from 12-1 M ^. ^-^r — Muscle-cell/— Secreting-cells wide and about the same distance from the anus, are not all the same, but include, G. 1165. according to Huber, four varieties. In addition to (i)the usual sweat glands and(2) some (Gays) of excep-tional size, (3) others haverelatively straight ducts thatend in expanded saccules,from which secondary alveoliarise ; finally (4) branchedglands of the tubo-alveolartyj)e are j)resent. The cili-ary glands ( Molls; of theeyelid
Human anatomy, including structure and development and practical considerations . manal glands, lodged chieHy within a zone from 12-1 M ^. ^-^r — Muscle-cell/— Secreting-cells wide and about the same distance from the anus, are not all the same, but include, G. 1165. according to Huber, four varieties. In addition to (i)the usual sweat glands and(2) some (Gays) of excep-tional size, (3) others haverelatively straight ducts thatend in expanded saccules,from which secondary alveoliarise ; finally (4) branchedglands of the tubo-alveolartyj)e are j)resent. The cili-ary glands ( Molls; of theeyelid are not typical coiledstructures, but belong tothe branched tubo-aheolargroups. The ceruminousglands, distinguished bythe large amount of oil andpigment mingled with theirsecretion, are likewise refer-able to the branched tubo-alveolar tyjie. The blood-vessels ofthe sweat glands includearterial twigs given off fromthe cutaneous rete, a capillarynet-work outside the mem-brana propria, best developedthat join the deeper plexus Parts of duct Parts of coiled secreting segment. Section of deeper coiled portion of sweat-gland. X 325- within the coiled portion of the tube, and the veinswithin the corium. The nerves are especially numerous and consist of nonmedullated sympatheticfibres that tra\erse the fibrous sheath and form a close plexus on the outer surfaceof the membrana propria. From this net-work hbrilLe penetrate the basementmembrane and end in close apposition with the gland-cells and termination on the secreting cells is, according to Arnstein. in the form ofpeculiar endings consisting of groups and clusters of minute terminal knobs withwhich the nerve fibrillae, without or after division, are beset. THE DEVELOPMENT OF THE SKIN AND ITS APPENDAGES. The Skin.—The integument consists of two genetically distinct parts—theepithcliicm C epidermis) developed from the ectoblast. and the connective tissue(corium and tela subcutanea) from the mesoblast.
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
