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The word vascular, meaning relating to the blood vessels, is derived from the Latin vas, meaning vessel. Some structures – such as cartilage , the epithelium , and the lens and cornea of the eye – do not contain blood vessels and are labeled avascular .
Capillaries join the arteries and veins. The circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrate. [ 1][ 2] It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia ...
The word hemodynamics ( / ˌhiːmədaɪˈnæmɪks, - moʊ -/ [ 40]) uses combining forms of hemo- (which comes from the ancient Greek haima, meaning blood) and dynamics, thus "the dynamics of blood ". The vowel of the hemo- syllable is variously written according to the ae/e variation . Blood hammer. Blood pressure.
Hemostasis. In biology, hemostasis or haemostasis is a process to prevent and stop bleeding, meaning to keep blood within a damaged blood vessel (the opposite of hemostasis is hemorrhage ). It is the first stage of wound healing. Hemostasis involves three major steps: vasoconstriction.
Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, in particular the large arteries and small arterioles. The process is the opposite of vasodilation, the widening of blood vessels. The process is particularly important in controlling hemorrhage and reducing acute blood loss.
Vasodilation. Vasodilation, also known as vasorelaxation, is the widening of blood vessels. [ 1] It results from relaxation of smooth muscle cells within the vessel walls, in particular in the large veins, large arteries, and smaller arterioles. [ 2] Blood vessel walls are composed of endothelial tissue and a basal membrane lining the lumen of ...
Vein. Structure of a vein, which consists of three main layers; an outer layer of connective tissue, a middle layer of smooth muscle, and an inner layer lined with endothelium. Veins ( / veɪn /) are blood vessels in the circulatory system of humans and most other animals that carry blood towards the heart.
Thrombosis (from Ancient Greek θρόμβωσις (thrómbōsis) 'clotting') is the formation of a blood clot inside a blood vessel, obstructing the flow of blood through the circulatory system. When a blood vessel (a vein or an artery) is injured, the body uses platelets (thrombocytes) and fibrin to form a blood clot to prevent blood loss.