Microcirculation

The microcirculation is the circulation of the blood in the smallest blood vessels, the microvessels of the microvasculature present within organ tissues.

The systemic circulation can also be seen to function in two parts – a macrocirculation and a microcirculation.

The microvessels include terminal arterioles, metarterioles, capillaries, and venules.

A metarteriole is a short microvessel in the microcirculation that links arterioles and capillaries.

In addition to these blood vessels, the microcirculation also includes lymphatic capillaries and collecting ducts.

Lymph capillaries or lymphatic capillaries are tiny, thin-walled microvessels located in the spaces between cells (except in the central nervous system and non-vascular tissues) which serve to drain and process extracellular fluid.

Most vessels of the microcirculation are lined by flattened cells of the endothelium and many of them are surrounded by contractile cells called pericytes.

Pericytes (previously known as Rouget cells) are multi-functional mural cells of the microcirculation that wrap around the endothelial cells that line the capillaries and venules throughout the body.

The microvessels include terminal arterioles, metarterioles, capillaries, and venules.

These microvessels are the site of exchange of many substances with the interstitial fluid surrounding them.

The microvessels include terminal arterioles, metarterioles, capillaries, and venules.

A venule is a very small blood vessel in the microcirculation that allows blood to return from the capillary beds to drain into the larger blood vessels, the veins.

The microvessels include terminal arterioles, metarterioles, capillaries, and venules. The vessels on the arterial side of the microcirculation are called the arterioles, which are well innervated, are surrounded by smooth muscle cells, and are 10-100 μm in diameter.

An arteriole is a small-diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries.

In the pre-capillary sector, arterioles, and precapillary sphincters participate.

A precapillary sphincter is a band of smooth muscle that adjusts blood flow into capillaries mainly in the mesenteric microcirculation.

Most vessels of the microcirculation are lined by flattened cells of the endothelium and many of them are surrounded by contractile cells called pericytes.

The Microcirculatory Society, Inc. was the first scientific society founded to promote research and teaching in the field of microcirculation.

Other hormones (catecholamine, renin-angiotensin, vasopressin, and atrial natriuretic peptide) circulate in the bloodstream and can have an effect on the microcirculation causing vasodilation or vasoconstriction.

The third capillary exchange mechanism is transcytosis, also called vesicular transport.

Transcytosis is prominent in brain microvascular peptide and protein transport, because the brain microvascular endothelium, which forms the blood-brain barrier (BBB) in vivo, expresses unique, epithelial-like, high-resistance tight junctions.

The microcirculation is the circulation of the blood in the smallest blood vessels, the microvessels of the microvasculature present within organ tissues.

The microcirculation is the circulation of the blood in the smallest blood vessels, the microvessels of the microvasculature present within organ tissues.

The microcirculation is the circulation of the blood in the smallest blood vessels, the microvessels of the microvasculature present within organ tissues.

The microcirculation is the circulation of the blood in the smallest blood vessels, the microvessels of the microvasculature present within organ tissues.

Arterioles carry oxygenated blood to the capillaries, and blood flows out of the capillaries through venules into veins.

The main functions of the microcirculation are the delivery of oxygen and nutrients and the removal of carbon dioxide (CO 2 ).

The main functions of the microcirculation are the delivery of oxygen and nutrients and the removal of carbon dioxide (CO 2 ).

It also serves to regulate blood flow and tissue perfusion thereby affecting blood pressure and responses to inflammation which can include edema (swelling).

It also serves to regulate blood flow and tissue perfusion thereby affecting blood pressure and responses to inflammation which can include edema (swelling).

The vessels on the arterial side of the microcirculation are called the arterioles, which are well innervated, are surrounded by smooth muscle cells, and are 10-100 μm in diameter.

The vessels on the arterial side of the microcirculation are called the arterioles, which are well innervated, are surrounded by smooth muscle cells, and are 10-100 μm in diameter.

The regulation of tissue perfusion occurs in microcirculation.

Noradrenaline and adrenaline have effects on alpha and beta adrenergic receptors.