1. The circulatory system comprises the heart and blood vessels, categorized into arteries, veins, and capillaries.
2. Arteries, with their thick and elastic walls, bear the pressure exerted by the blood propelled forcefully during ventricular systole.
3. The heart pumps blood at high pressure into the aorta and its branches to supply oxygen and nutrients to both the brain and areas below the heart.
4. Veins play a crucial role in returning deoxygenated blood back to the heart for reoxygenation.
5. Capillaries, the smallest vessels, facilitate the exchange of nutrients and waste products between blood and surrounding tissues.
6. The arterial system’s resilience ensures efficient blood circulation, supporting vital functions throughout the body.