The vascular system is a highly complex yet precisely organised closed network of vessels through which blood circulates to all tissues and organs of the body, delivering oxygen, essential cells and proteins required for normal function<\/p>\n
The vascular or circulatory system transports blood throughout the human body. Its central component is the heart. The left side of the heart pumps oxygenated blood through the arteries to all organs and tissues. As arteries branch, they gradually become smaller and form capillaries, where oxygen and nutrients are exchanged with tissues.\nAfter delivering oxygen, blood continues through the venous capillaries and returns via larger veins (the superior and inferior vena cava) to the right side of the heart. From there, it is pumped to the lungs for oxygenation before returning to the left side of the heart, beginning a new cardiac cycle.<\/p>\n
Arteries carry oxygenated blood under pulsatile pressure throughout the body. They consist of three layers and are highly elastic. The largest artery is the aorta, which is particularly important due to its association with aneurysm formation. Smaller arteries vary in importance depending on the organs they supply and the availability of collateral circulation.<\/p>\n
Veins return deoxygenated blood from tissues back to the lungs. Their walls are thinner, more compressible and more fragile than arterial walls. Veins can dilate significantly, which explains the development of varicose veins. The largest veins are the superior and inferior vena cava. Many smaller veins may remain inactive and become functional when needed (e.g. pregnancy, thrombosis, inflammation).<\/p>\n
Capillaries are microscopic vessels connecting arteries and veins, allowing exchange of oxygen, nutrients, carbon dioxide and metabolic waste between blood and tissues.<\/p>\n
The system consists of the heart, arteries, veins and capillaries. The heart acts as the central pump with four chambers: two atria and two ventricles. Oxygenated blood is pumped from the left ventricle into the aorta and distributed through arteries, arterioles and finally capillaries.
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A healthy vascular system is essential for overall wellbeing. Efficient circulation ensures adequate oxygen and nutrient delivery while removing metabolic waste, maintaining physiological balance (homeostasis). Healthy vessels reduce the risk of cardiovascular diseases such as atherosclerosis, hypertension, peripheral arterial disease, venous insufficiency, and venous thrombosis. Good circulation also supports brain, kidney, and skin health and contributes to the prevention of stroke and cognitive decline.<\/p>\n
Maintaining vascular health through balanced nutrition, regular exercise and avoidance of smoking and excessive alcohol consumption is critical for longevity and quality of life. The vascular surgeon is the specialist responsible for diagnosis, imaging and treatment of vascular disorders, ranging from ultrasound assessment to angioplasty or bypass surgery.<\/p>","protected":false},"excerpt":{"rendered":"
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