Capillary portal vein. Medical search. Frequent questions

Blood is supplied to the liver via circulation through two distinct sources: the hepatic artery and the portal vein. (nativeremedies.com)
These blood vessels subdivide in the liver continuously, until they end up in very small capillaries. (nativeremedies.com)
sinusoid , irregular tubular space for the passage of blood, taking the place of capillaries and venules in the liver , spleen , and bone marrow . (britannica.com)
The sinusoids form from branches of the portal vein in the liver and from arterioles (minute arteries) in other organs. (britannica.com)
Three hepatic veins remove blood from the liver. (medicalnewstoday.com)
Hepatic ultrasonograph on the second day after admission showed totally reversed direction of portal venous blood flow away from the liver ( Figure , panel A), becoming bidirectional on the following day and, finally, reverting to normal direction (although with low velocity) 3 days later ( Figure , panel B). Despite improved hemodynamic status, progressive encephalopathy and gastrointestinal bleeding developed and were unresponsive to treatment. (cdc.gov)
Ultrasonograph images from patients with liver failure caused by acetaminophen poisoning or hepatitis B indicate increased portal vein flow and normal flow velocity to the damaged liver ( 5 ). (cdc.gov)
The liver is supplied with blood by two vessels, the hepatic portal vein, and the hepatic artery. (quizlet.com)
Portal hypertension is a medical problem characterized by high blood pressure in the portal blood vessel system, which brings blood from the digestion body organs to the liver. (ehabassal.com)
Portal high blood pressure can emerge from several underlying problems that impact the liver or the capillary in the portal blood vessel system. (ehabassal.com)
Growths situated in the liver, pancreatic, or neighboring stomach organs can compress the portal capillary and trigger high blood pressure. (ehabassal.com)
These underlying reasons can dramatically impact the performance of the liver and also add to the growth of portal hypertension. (ehabassal.com)
This blood flows through tiny capillaries in the intestinal wall into the portal vein, which enters the liver. (msdmanuals.com)
Blood from the intestines and heart then mix together in the liver tissues and flow back to the heart through the hepatic vein. (msdmanuals.com)
Accordingly, these functions are performed later, after all the blood coming from this huge surface area has been collected and funneled via the portal vein into the liver. (helmberg.at)
This implies two consecutive capillary exchange systems: one in the intestinal wall, the second, with low remaining blood pressure, in the liver. (helmberg.at)
Once in the capillaries (venous, arterial or lymphatic), it reaches the liver via the portal vein and then the lungs within the first week. (statpearls.com)
The portal vein delivers 80% of the total liver blood supply, while the remaining 20%, i.e., the oxygenated blood, flows through the hepatic artery. (encyclopedia.pub)
The gut and liver are intricately connected through the portal vein and biliary circulations. (encyclopedia.pub)
Microbial sensing by toll-like receptors (TLR) on liver sinusoidal endothelial cells (LSECs) results in a CXCL9 chemokine gradient that attracts Kupffer cells closer to the periportal region to ensure immune surveillance and host defense from invading pathogens arriving through the portal vein circulation. (encyclopedia.pub)
The portal vein, that carries blood from the digestive system to the liver, was distended by a large blood clot (or thrombus). (sandiegozoo.org)
In contrast to mammals, the liver cells (hepatocytes) are not arranged radially around a vein, but rather irregularly in follicles or alveoli. (agchamaeleons.de)
Common signs and symptoms may stem from decreased hepatic synthetic function (eg, coagulopathy), portal hypertension (eg, variceal bleeding), or decreased detoxification capabilities of the liver (eg, hepatic encephalopathy). (medscape.com)

The superior hypophyseal arteries form the primary capillary plexus that supplies blood to the median eminence. (wikipedia.org)
The portal vessels (veins) arise from the primary capillary bed on the median eminence (pink area to the left) and fan out over the anterior pituitary gland (right) at the pituitary stalk junction to the right. (endocrinology-journals.org)

Results of other studies showed that the neural hypophyseal stalk and ventromedial region of the hypothalamic arcuate nucleus receive arterial blood from ascending and descending infundibular branches and capillaries, coming from arteries of the superior hypophyseal arterial system. (wikipedia.org)
Classically, it had been assumed and taught that outward filtration predominates at the arterial end of the capillary, while, in the venule, as hydrostatic pressure falls, fluid returns to the capillary from the interstitium, driven by the oncotic pressure gradient. (medilib.ir)

Particularly the obstructive type of total anomalous pulmonary venous connection (TAPVC), in which pulmonary veins drain into systemic venous structures or directly into right atrium without having any direct connection to left atrium, cause RDS by leading to severe pulmonary congestion. (lupinepublishers.com)

Each capillary leads to a lobule. (nativeremedies.com)
The blood vessels divide into small capillaries, with each ending in a lobule. (medicalnewstoday.com)
These blood vessels subdivide into capillaries, which then lead to a lobule [ 2 ]. (blogspot.com)
Adjacent trabeculæ become arranged into the form of a lobule, each with a vascular channel in its interior, which communicates with the vascular network in the surface of the lobule by capillary intervals between adjacent trabeculæ. (co.ma)
Upon mixing, the blood flows across the lobule through the hepatic sinusoids and drains into the central veins, while the bile flows in the opposite direction via the bile canaliculi. (encyclopedia.pub)

Specifically within and between the pituitary lobes is anatomical evidence for confluent interlobe vessels, including venules providing blood from the anterior to the neural lobe, and capillary shunts exchanging blood between the intermediate and neural lobes. (wikipedia.org)
Even though the residual blood in the capillaries that flows back from the venules may cause extravasation of RBC in the mucosa (lamina propria of the villi) or scattered hemorrhagic foci in the submucosa or subserosa, it is unlikely for this small amount of hemorrhage to cause considerable wall thickening. (ajronline.org)
Moreover, in other sites, such as the spinal cord, the prevailing mechanism for DCS is not AGE, but more likely local bubble formation with subsequent compression of venules and capillaries. (who.int)

This condition takes place when there is a blockage or buildup of stress within the portal vein or its branches. (ehabassal.com)
Embolism in the portal vein or its branches can obstruct blood flow and rise stress in the portal capillary system. (ehabassal.com)
The central vein becomes a tributary of a hepatic vein, and the capillary network becomes the terminal distribution of branches of the portal vein. (co.ma)
It receives tributaries which correspond with the branches of the femoral artery and the larger of the two superficial veins of the lower extremity, viz. (co.ma)
In the connective tissue, branches of the portal vein, hepatic artery, small bile ducts and lymphatic vessels could be visualised. (agchamaeleons.de)

Decreased portal vein flow velocity and reversal of the flow direction is seen in the terminal stage of hepatic cirrhosis and a few other conditions such as hepatic sinusoidal obstruction (hepatic veno-occlusive disease), arterioportal fistula, extrahepatic portal vein thrombosis, and hepatic venous outflow obstruction ( 6 ). (cdc.gov)
This can be caused by a variety of conditions, including venous obstruction, as occurs with deep vein thrombosis or venous stasis, and allergic reactions (such as laryngeal edema). (medilib.ir)
A condition caused by one or more episodes of DEEP VEIN THROMBOSIS, usually the blood clots are lodged in the legs. (lookformedical.com)

Blood then passes from the sinusoids into the hepatic vein for return to the heart . (britannica.com)

As bacteria proliferate and more gas is produced, the intraluminal gas may dissect into the necrotic wall (pneumatosis intestinalis), spread through the mesenteric veins, and finally flow into the portal veins (Fig. 7A , 7B ). (ajronline.org)

The external iliac vein (Figs. 773, 774, and 777) is the upward continuation of the femoral vein. (co.ma)
The pubic vein forms a communication between the obturator vein and the external iliac vein. (co.ma)
Commencing in the obturator canal, it ascends, along the pubic branch of the inferior epigastric artery, to reach the external iliac vein. (co.ma)
it is a continuation of the popliteal vein and becomes the external iliac vein. (lookformedical.com)

Seventeenth-century English anatomist William Harvey, who questioned some of Galen's conclusions, described the heart as a 4-chambered pump that moves blood through arteries and veins, not air. (medscape.com)
Neoplasms located in the vasculature system, such as ARTERIES and VEINS. (lookformedical.com)

A compression of ILIAC VEIN that results in a decreased flow in the vein and in the left LOWER EXTREMITY due to a vascular malformation. (lookformedical.com)
Compression of the left common ILIAC VEIN by the right common ILIAC ARTERY against the underlying fifth LUMBAR VERTEBRA is the typical underlying malformation. (lookformedical.com)

The hypophyseal portal system is a system of blood vessels in the microcirculation at the base of the brain, connecting the hypothalamus with the anterior pituitary. (wikipedia.org)
Short portal vessels between the neural and anterior pituitary lobes provide an avenue for rapid hormonal exchange. (wikipedia.org)
Hormone-exchanging blood vessels between the hypothalamus and the pituitary gland, similar to those of the hypophyseal portal system, can be observed in early developmental stages of the fetus. (wikipedia.org)
The heart and blood vessels (arteries, capillaries, and veins) are called the cardiovascular system . (cdc.gov)
The heart pumps blood through blood vessels called "arteries" and then through smaller blood vessels called "capillaries" to each organ and tissue in the body. (cdc.gov)
Portal hypertension can trigger the growth of bigger blood vessels, referred to as varices, in the esophagus, tummy, or rectum. (ehabassal.com)
It is connected to two large blood vessels, one called the hepatic artery and one called the portal vein. (blogspot.com)
High-power view through a dissecting microscope of the hypophysial portal vessels on the anterior surface of the pituitary stalk (left) of an anesthetised rat. (endocrinology-journals.org)
Note: The contentious history of the discovery and function of the hypophysial portal vessels is detailed in chapter 2 of Harris' (1955) monograph, to which the interested reader is referred. (endocrinology-journals.org)
The direction of portal vessel blood flow (centrifugally from the hypothalamus to the anterior pituitary gland) was ultimately resolved by microscopic visualisation of the vessels in the living anaesthetised rat (Green & Harris 1949). (endocrinology-journals.org)
The functional importance of the hypophysial portal vessels involved Harris in a conflict with the influential Sir Solly Zuckerman, who, on the basis of studies in the ferret, challenged the neurohumoral hypothesis of anterior pituitary control. (endocrinology-journals.org)
The vessels carrying blood away from the capillary beds. (lookformedical.com)
The hepatocytes are surrounded by capillary blood vessels. (agchamaeleons.de)
Blood samples and four blood vessels, the aorta, superior vena cava, pulmonary vein and pulmonary artery, were obtained from 11 slaughtered sheep. (who.int)

Tightening of the portal vein because of scarring or swelling can limit blood circulation, resulting in boosted pressure in the portal vein system. (ehabassal.com)
Increased pressure in the portal vein. (nih.gov)

The vein which drains the foot and leg. (lookformedical.com)

Other evidence indicates that capillary perivascular spaces of the median eminence and arcuate nucleus are contiguous, potentially facilitating hormonal messages between systemic blood and the ventral hypothalamus. (wikipedia.org)
In a specimen at week 11.5, the median eminence and infundibular stem contained the compound, suggesting the existence of the fully developed portal system. (wikipedia.org)
The peptides released at the median eminence enter the primary plexus capillaries. (wikipedia.org)

The portal vein supplies nutrient-rich blood from the small intestine. (nativeremedies.com)
The portal vein brings in nutrient-rich blood from the digestive system, and the hepatic artery carries oxygenated blood from the heart. (medicalnewstoday.com)

The capillaries in the portal system are fenestrated (have many small channels with high vascular permeability) which allows a rapid exchange between the hypothalamus and the pituitary. (wikipedia.org)
where Lp is the unit permeability (or porosity) of the capillary wall, S is the surface area available for fluid movement, Pcap and Pif are the capillary and interstitial fluid hydraulic pressures, ecap and eif are the capillary and interstitial fluid oncotic pressures, and s represents the reflection coefficient of proteins across the capillary wall (with values ranging from 0 if completely permeable to 1 if completely impermeable). (medilib.ir)

and (3) the systemic circulation that distributes dietary metabolites, free fatty acids, ethanol and choline metabolites to the intestine across blood capillaries ( Figure 1 ). (encyclopedia.pub)

that is, the deep circumflex iliac and inferior epigastric veins open into it, close to its commencement, whilst, in addition, it freSuperficial epigastric vein quently receives the pubic vein. (co.ma)
the inferior mesenteric vein empties into the splenic vein, the superior mesenteric vein joins the splenic vein to form the portal vein. (lookformedical.com)
A vein on either side of the body which is formed by the union of the external and internal iliac veins and passes upward to join with its fellow of the opposite side to form the inferior vena cava. (lookformedical.com)

The hepatic artery carries blood from the aorta, whereas the portal vein carries blood containing digested nutrients from the entire gastrointestinal tract and also from the spleen and pancreas. (blogspot.com)

The capillaries then drain used blood into veins that flow back to the heart to be recirculated. (cdc.gov)
Veins in the neck which drain the brain, face, and neck into the brachiocephalic or subclavian veins. (lookformedical.com)

It treats portal vein blockage and blockage of veins in the pelvic area that ultimately are manifested as hemorrhoids. (mfine.co)

We previously reported increased portal vein congestion during the toxic stage of DENV infection ( 7 ). (cdc.gov)
By relieving hepatic congestion and portal pressure, Pilex tablet plays a facilitatory role in hepatic disorders associated with venous congestion. (uscapharm.com)

The neurohormones are released into the perivascular space, and from there, they move rapidly into portal vessel blood for transport to the pituitary gland. (endocrinology-journals.org)

Venous hypertension leads to increased pressure in the capillary bed, transudation of fluid and proteins into the interstitial space, altering blood flow and supply of nutrients to the skin and subcutaneous tissues, and eventual ulceration. (lookformedical.com)

The intramural arteriocapillaries first lose part of their volume as the earlier entered blood flows out from the veins, even though some blood may seep back from the veins. (ajronline.org)

This plant also improves capillary resistance and blood viscosity. (mfine.co)

The formation or presence of a blood clot (THROMBUS) within a vein. (lookformedical.com)

As the blood circulation in the portal blood vessel is blocked, the spleen often increases the size of. (ehabassal.com)
This procedure aids reroute blood circulation and reduce stress in the portal capillary system. (ehabassal.com)
The portal circulation. (uninsubria.eu)

ideas is a minimally intrusive treatment that develops a shunt or bypass between the portal capillary and also the hepatic vein. (ehabassal.com)

A short thick vein formed by union of the superior mesenteric vein and the splenic vein. (lookformedical.com)

Skin breakdown or ulceration caused by VARICOSE VEINS in which there is too much hydrostatic pressure in the superficial venous system of the leg. (lookformedical.com)

Abdominal ultrasound showed splenomegaly, dilated portal vein and hepatomegaly with periportal thickening. (who.int)

The blood supply and direction of flow in the hypophyseal portal system has been studied over many years on laboratory animals and human cadaver specimens with injection and vascular corrosion casting methods. (wikipedia.org)

In fact, Nobel Laureate (1947) Bernado Houssay and his team had reported the centrifugal direction of portal vessel blood flow in the living toad (Houssay et al . (endocrinology-journals.org)
Note the high density of nerve terminals around part of a primary portal capillary vessel (P), which is fenestrated (F). Note also the large number of agranular and granular vesicles in the nerve terminals. (endocrinology-journals.org)

However, subsequent observations have shown that, in most capillary beds, net filtration continues throughout the length of the capillary, and that many of the assumptions of the Starling relationship are invalid [ 3-6 ]. (medilib.ir)

A congenital disorder that is characterized by a triad of capillary malformations (HEMANGIOMA), venous malformations (ARTERIOVENOUS FISTULA), and soft tissue or bony hypertrophy of the limb. (lookformedical.com)

Its building blocks are the hepatic lobules organized around central veins and portal triads, consisting of a portal vein, a hepatic artery and a bile duct. (encyclopedia.pub)

compartment of the femoral sheath, and, not uncommonly, it is joined by the medial and lateral circumflex veins. (co.ma)
The superficial veins of the sole of the foot form a fine plexus, immediately under cover of the skin, from which anterior, medial, and lateral efferents pass. (co.ma)
The anterior efferents terminate in a transverse arch which lies in the furrow at the roots of the toes, and the medial and lateral efferents pass round the sides of the foot to the great or small saphenous veins. (co.ma)
from the lateral side of the little toe in the small saphenous vein. (co.ma)
the great saphenous vein, and laterally by joining the lateral dorsal digital vein of the little toe to form the small saphenous vein. (co.ma)

The veins that return the oxygenated blood from the lungs to the left atrium of the heart. (lookformedical.com)

The raised stress in the portal vein system can lead to the build-up of fluid in the abdominal cavity, triggering ascites. (ehabassal.com)
However, the alteration in capillary hemodynamics results in most of the retained fluid entering the interstitium and eventually becoming apparent as edema. (medilib.ir)
Capillary hemodynamics - The exchange of fluid between the plasma and the interstitium is determined by the hydraulic and oncotic pressures in each compartment. (medilib.ir)

From there, they are transported to the anterior pituitary via hypophyseal portal veins to the secondary plexus. (wikipedia.org)
The secondary plexus is a network of fenestrated sinusoid capillaries that provide blood to the anterior pituitary. (wikipedia.org)
The following is a list of hormones that rely on the hypophyseal portal system to indirectly mediate their function by acting as a means of transportation from various nuclei of the hypothalamus to the anterior pituitary. (wikipedia.org)
In its whole course the vein lies anterior to the obturator nerve. (co.ma)
Popa & Fielding (1930, 1933), who first discovered the hypophysial portal system, posited that the direction of blood flow was centripetal: that is, from the anterior pituitary gland towards the hypothalamus. (endocrinology-journals.org)

The special dorsal digital veins of the adjacent borders of the interdigital clefts unite, at the apices of the clefts, to form four dorsal metatarsal veins which terminate in the dorsal venous arch. (co.ma)

The transverse arch receives also small plantar digital veins from the toes, and it communicates by intercapitular veins with the veins on the dorsum of the foot. (co.ma)

Because portal pulsatility suggests gut edema and consequent poor bioavailability of furosemide. (nephropocus.com)

Anatomy30

Organisms5

Diseases23

Chemicals and Drugs1

Analytical, Diagnostic and Therapeutic Techniques and Equipment28

Phenomena and Processes16

Named Groups1

Health Care2

Liver23

Primary capillary2

Arterial2

Pulmonary veins1

Lobule5

Venules3

Branches5

Thrombosis3

Sinusoids1

Mesenteric veins1

External ilia4

Arteries and veins2

Iliac vein2

Vessels14

Pressure in the portal vein2

Drains1

Median eminence3

Nutrient-rich blood2

Permeability2

Intestine1

Inferior3

Aorta1

Drain2

Blockage1

Congestion2

Perivascular1

Interstitial1

Flows1

Improves1

Blood clot1

Circulation3

Bypass1

Splenic1

Hydrostatic pressure1

Splenomegaly1

Vascular1

Vessel2

Beds1

Tissue1

Lobules1

Lateral5

Lungs1

Fluid3

Anterior5

Adjacent1

Small1

Edema1