circulation physiology

Circulatory physiology involves the movement of blood throughout the body, ensuring organs and tissues receive oxygen and nutrients while removing waste products. The heart acts as a pump, propelling blood through a network of arteries, veins, and capillaries. Arteries carry oxygen-rich blood away from the heart to tissues; veins return oxygen-poor blood back to the heart. Capillaries are tiny vessels where exchanges happen at a cellular level. This system helps maintain blood pressure, regulate temperature, and support overall body function by efficiently distributing vital substances and maintaining homeostasis.