Understanding Circulatory and Respiratory Systems

Taska,·

Circulatory System

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SubjectCirculatory System

The circulatory system is a complex network that serves as the body's main transport system. Central to this system is the heart, a muscular organ with four chambers – the right and left atria and the right and left ventricles. Arteries carry oxygenated blood from the heart at high pressure, while veins return deoxygenated blood, maintaining one-way flow with valves. The smallest blood vessels, capillaries, facilitate the exchange of oxygen, nutrients, and waste products due to their thin walls. Blood is composed of red blood cells (which carry oxygen), white blood cells (which defend against infection), platelets (which aid in clotting), and plasma (the liquid medium). Together, these components ensure proper circulation and delivery of essential substances throughout the body.