Sinusoid, Capillary Sinusoid

A sinusoid, or sinusoidal capillary, is a special type of blood vessel that is found in several organs of the human body, including the liver and adrenal glands. Sinusoids have a diameter of 25 to 30 microns and perform an important function in the metabolism of the body.

A particularly large number of sinusoids can be found in the liver, where these capillaries begin from the perilobular vein and follow into the central vein of the lobule. Along the way, the sinusoidal capillaries merge with the arterial capillaries, which arise from the perilobular artery. Thus, mixed blood flows through the sinusoidal capillaries: oxygen-rich blood coming from the hepatic artery and blood from the portal vein flowing from the intestine, rich in nutrients.

Oxygen and nutrients diffuse through the walls of the sinusoids into the liver cells, where they are used for metabolism and energy production. The liver also detoxifies the blood, that is, removes toxins and other harmful substances.

The outflow of blood from the sinusoids occurs through the hepatic veins, which collect blood from different parts of the liver and carry it out of the body. The system of sinusoids and hepatic veins plays an important role in metabolism and blood purification, so any disturbances in its functioning can lead to serious diseases.

In general, sinusoids are important elements of the circulatory system that ensure efficient metabolism in the body. Although these capillaries are found only in some organs, their role in maintaining the health and functioning of the body cannot be overestimated.

Sinusoids are a type of blood vessel that have a diameter of 25 to 30 micrometers and are located in various organs such as the liver and adrenal glands. Their peculiarity is that they form an extensive network, which allows blood to be quickly and efficiently distributed throughout the organ. In the liver, for example, you can find a large number of sinusoids that start from the perilobular vein and follow to the central vein of the lobule. Along the way, the sinusoids merge with other arterial capillaries. Thus, mixed blood flows through the sinusoids, enriched with oxygen from the hepatic artery and rich in nutrients from the intestinal portal vein. Oxygen and nutrients diffuse into the liver cells through the capillary walls, and blood outflows through the hepatic vein. The portal vein system is also connected to the sinusoids, as they ensure the exchange of substances between the blood and liver cells. Thus, sinusoids are an important element in the functioning of the liver and other organs, and their study can help in understanding metabolic processes and blood supply.

*Sinusoids are blood capillaries with a diameter of 25 to 30 micrometers found in some human organs such as the liver or adrenal glands.*

Sinusoidal type capillaries are found in large numbers in liver tissue. There are no bleeding tracts from the sinusoids, since they have a direct connection with the portal blood system. Thanks to this, there is a continuous exchange of blood fluid and substances between cells and sinusoids.

Externally, sinusoids resemble small-diameter arteries located near the lobar formation of vessels. A large volume of blood vessels is associated with these capillaries, so they can serve as the circulatory system of the patient's organs. In liver diseases, circulatory processes in the body are disrupted, but the most changes are observed in sinusoidal cells.

*In clinical practice, sinusoids play an important role, since changes in their number and condition can be a sign of serious diseases that are dangerous to health.*