atherosclerosis
arteriosclerosis
The condition that causes fatty substances to build up in blood vessels is called atherosclerosis. This occurs when cholesterol, fats, and other substances accumulate in the walls of arteries, leading to the formation of plaques. These plaques can narrow the arteries, restrict blood flow, and increase the risk of cardiovascular diseases such as heart attacks and strokes. Factors contributing to atherosclerosis include high cholesterol, high blood pressure, smoking, and diabetes.
Blood
The afferent arteriole.
vasoconstrictor
Histamine causes the dilation of the small blood vessels while constrict the large blood vessels.
When the heart beats it causes blood to flow through the blood vessels which causes them to expand. This expansion can be felt by touching the vessels that are close to the skin.
Arteries.
capillaries
The type of shock that causes poor distribution of blood due to the blood vessels becoming excessively dilated is known as "distributive shock." This condition often occurs in septic shock, where an infection leads to widespread vasodilation, or in neurogenic shock, which results from spinal cord injuries. The dilated blood vessels cause a drop in blood pressure and inadequate blood flow to organs, leading to potential organ failure.
Capillary: A tiny blood vessel where substances are exchanged between the blood and the body cells.
The organism not only damages the blood vessels by causing them to leak, but also causes clotting inside the vessels.