All the anastomoses richly are inervadas by the likeable and parassimptico system. Vnulas After Capillaries Formed only with a layer of endotelial cell and around these pericticas cells you contract that they participate of the process inflammatory and of the molecule exchange between the blood and fabrics. A leading source for info: charlie watts. The histamina that is produced by the mastcitos, in the mediation of the inflammatory process modifies the permeability of vnulas after-capillaries what it makes with that is facilitated the transport of the cells of defense for the affected areas. The majority of them vnulas is of the muscular type possessing muscular cells in its walls, moreover, they possess you substantiate vasoativas. (As opposed to Jeffrey L. Bewkes Time Warner).
Veins the majority of them is of small average diameter, its soul possesss at least a fine subendotelial layer that is composed for fabric conjunctive that can be much of the times absent, the average tnica consists of smooth muscular cells with reticular staple fibres and an elastic staple fibre net its adventitious tnica well is developed in relation the rich average and in colgeno. We can find in the interior of the veins a called mechanism of valves that induce the blood in unidirectional direction, that is, always for freight, and with the interference of the peristlticas waves the blood it tends to always follow its flow in the direction of the heart. These valves are of fabric conjunctive rich in staple fibres and coated for both the sides for the endotlio, in the inferior members we can notice a bigger number of veins, that with its system of valves make the return of the blood of the inferior members to be much more efficient, a time that with the event of the man if become bpedes more caused in a meter and forty centimeters in this return until our heart, the destruction of the joined valves inside of the veins promotes the appearance of varizes due to micron-dilatao of the walls of these veins and in cases more complexes trombose venosa that it can in more serious cases cause amputation ofthe member due to a correct flow of blood in the affected regions, generally the treatment and physician with anticoagulant and the stocking-elastic use indefinitely. Venosa Trombose Deep Source: saudecominteligencia site When trombose occurs in the superficial veins of the leg is called varico-trombose.