Milza
The information brought back here have only an illustrative aim: they are not riferibili neither to prescription neither to medical councils -
milza it is a situated linfoide structure organ in the abdominal cavity.
The milza i are present in nearly all vertebrati; in the human embryo it begins to form itself to the first month of life.
The milza it has a emocateretica function (destroys i a linfopoietica function ages to you) and (produces i of ). The milza it collects also from destroyed red globules so that it can be recovered and be red-use for new red globules.
Although this its important function, the milza is not an indispensable organ to the life.
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Human anatomy
The milza it is situated in the abdominal cavity, the left ipocondrio between ninth and eleventh rib, and structure similar introduces one to linfoghiandole, with the difference that the milza contracts relationships directed with it arranges blood.
Its shape is ovoidale, with a red color wine and one consistency motivatings force. It has a weight of 200 g approximately, long 13 cm, wide 8 cm and thick 3 cm.
Structure
The milza it is covered from one dense, with elastic fibers and insufficient smooth muscular fibers. This cap sendes towards the inside septa and trabecole that form a support scaffolding. To the inside of these the parenchyma distinguished in polpa red and polpa white woman is found.
The polpa red it is composed from reticular fiber wefts (reticulum of Tigris), from disposed linfoidi cells in cords and capillary venosi it expands (venosi breasts to you).
Polpa the white woman is constituted from nodules linfati to us (lienali corpuscoli of the Malpighi).
Vascolarizzazione
Lienale artery (or splenica) diparte from the tripode celiaco with to the left gastric artery and the common hepatic artery. The tripode celiaco it originates in its turn directly from abdominal. After passing rather along on the advanced margin of the body and the tail of the pancreas, the lienale artery is divided in coppers that, throughilo, they penetrate in the milza covering the trabecole, therefore they enter in a linfatico nodule. To the escape the artery sfiocca in smaller arteries (penicillari arteriole, than then sfociano in the venosi breasts (or pulpari gaps). From the veins are originated here trabecolari veins, that they meet in lienale vein, that it exits from the milza through the ilo and meets in .
During the distance, the blood collects the linfoidi cells and yields old red globules, with to elements injurious strangers or.
Relationships
The organ rests against diaphragm, it has relationships with (up) and with left (low). It is also in relationship with the left flessura of .
The peritoneale membrane covers it, creating of the legamenti that maintain it in situ:
- colico-lienale legamento, that it comes down from the left colica flessura (not always present)
- legamento brake-lienale, that it catches up the diaphragm up and it is for this said also sospensore legamento of the milza
- gastro-lienale legamento, cha the colleague to the stomach
Moreover, the tail of the pancreas contracts intimate relationships, talora surgical indissociabili, with the ilo of the milza.
Physiology
During the life it participates to the function of formation of red globules, function that gets lost in the first years of life. It acquits to the litica and cateretica function of the corpuscolata member of the blood, of which it presides the numerical control.
The milza form biliary pigments and free the iron that comes endured used from other organs in order to form (Hb). Some other present functions in inferior mammals seem to be lost in the man. Therefore in the dog, where the milza it has represented in way a lot important is in the cap that in the weft to trabecolare the smooth musculature, seems that the organ carries out also functions of blood reservoir, to immettere in circle by means of spremitura in stress conditions, being operated one true and own autotrasfusione of emergency (escape, combat etc.)
Pathology
Difficultly the milza it is preda of infectious or neoplastiche diseases. In the "tumor of milza" was preantibiotic was instead very famous that it was manifested in course of infectious diseases of long duration, like expression of the activation of the linfatica member of the organ. The tumors of the milza are nearly exclusively lymphomas. The obvious resistance of the milza has always aroused interest in oncologia to become center of metastatica repetition from part of solid tumors of other origin. Increases of volume also meant you of the milza (splenomegalies) they are had in the diseases of the liver, above all , that they cause to difficulty of flow in the system of the vein door (syndrome of portale hypertension), of which the lienale vein is fiscal To remember also the traumi, than seen its consistency, they can some provoke the breach with most serious inner hemorrhages.
Correlated voices
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