. A treatise on anatomy, physiology, and hygiene : designed for colleges, academies, and families. 188 ANATOMY, PHYSIOLOGY, AND HYGIENE. HYGIENE OF THE LYMPHATIC VESSELS. 404. By the action of the lymphatics, substances of aninjurious, as well as of a beneficial, character may be con-veyed into the system. These vessels, under certain condi-tions, are more active in their office than at other periods ;and it is of practical utility to know what influences theiraction. 405. The function of these vessels is increased by moisture,and lessened by an inactive state of the lacteals. Observationshows


. A treatise on anatomy, physiology, and hygiene : designed for colleges, academies, and families. 188 ANATOMY, PHYSIOLOGY, AND HYGIENE. HYGIENE OF THE LYMPHATIC VESSELS. 404. By the action of the lymphatics, substances of aninjurious, as well as of a beneficial, character may be con-veyed into the system. These vessels, under certain condi-tions, are more active in their office than at other periods ;and it is of practical utility to know what influences theiraction. 405. The function of these vessels is increased by moisture,and lessened by an inactive state of the lacteals. Observationshows that the ill-fed, and those persons that live in marshydistricts, contract contagious diseases more readily than thoseindividuals who are well fed, and breathe a dry and pure air. 406. The air of the sick-room should be dry. If dueattention is not given to ventilation, the clothing of the nurseand patient, together with the air of the room, will be moist-ened by the exhalations from the skin and lungs. Thisexhalation may contain a poison of greater or less power,according to its quantity and


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