Injection

Injection of various colored substances into blood vessels and lymphatic vessels and into some glandular ducts is widely used in descriptive and topographical anatomy to facilitate the study of these systems. In histology, there are also methods of injection of the vascular system for detailed study of the distribution of its terminal branches. Injection of an antiseptic substance into the vascular system is one of the methods of embalming corpses. In addition to injection into the vascular system, there are methods of injection of various hardening substances into serous cavities, respiratory and digestive tracts, glandular ducts, etc. For the anatomical study of the circulatory system, many colored hot and cold injection masses of various colors have been proposed, the common property of which is to solidify and harden after some time following injection. Some of these mixtures have the property of not allowing X-rays to pass through, which makes it possible to study the distribution of vessels radiologically. The filling of vessels is done with a pump or syringe, which is heated when injecting a hot mixture. The arteries of an entire corpse are filled through the aorta or femoral artery (see Embalming of corpses). It is recommended to prepare injected corpses one day after injection. A significant technical difficulty is the filling of lymphatic vessels due to their small caliber and the ease with which their walls rupture during injection. For details, see Blood vessels, Lymphatic vessels, Lungs, Liver, etc. Therapeutic injection - see Injections.