What is an intima tunic?
Intima tunica is part of the venous system and refers to the innermost layer of the interior of veins and arteries. It is one of the three layers that together form the tubular tissue structure of the vein and artery. The inner layer material is made of endothelial cells that are characterized by their extremely elastic properties. Due to the fragile nature of this material, Intima Tunica cannot be fully separated from the media Tunica, the middle layer of venous tissue and can only be examined in laboratories in small pieces. It was found that this thin, transparent layer of endothelial tissue actually has three of its own layers.
The strongest part of this incredibly thin membrane is a pheneored layer, and this is where Intima Tunica gains its elastic nature. This elasticity is caused by small fibers arranged in longitudinal lines to allow as much as possible movement in the role of veins and arteries as blood moves throughout the body. Even a small part of the membrane can be seen individual layers in thisa particular layer of tissue under the microscope. Larger blood vessels, such as aorta near the heart, have a significant thickness due to the pheneored layer, while the blood vessels that are smaller contain only a very thin layer of this connective tissue.
The middle layer of intima tunica is a subendothelial layer and is known for its branched cells that form a matrix or inter space tissue. Thingner than a pheneored layer, in the smallest blood vessels of the body, this layer reaches only one layer of stellar cells in the thickness. In larger circulatory blood vessels, this layer becomes more developed and then classified as connective tissue. The function of this part is to support the less stable inner layer during the normal blood flow.
The inmermost part of the intima tuna consists mainly of endothelial cells, the type of skin cell found on the inside of the body. These cells have different shapes and may appear oval, fusiform or POlygonal in the microscope when they are colored with silver nitrate. No matter what shape the membrane has each cell, they all have a common round or oval core. It is this layer of cells and tissue that comes in direct contact with the bloodstream. When studying after tissue death, it was noted that this layer deteriorated in longitudinal cracks or wrinkles.