Circulatory System Overview

Carrying nutrients, oxygen, vitamins, regulating body temperature, and preventing excessive bleeding

Arteries have three layers - a strong outer layer, a thick muscle layer, and a sleek inner layer called lumen.

The main artery is the aorta, and it carries oxygenated (pure) blood away from the heart to the rest of the body.

<p>Arteries have thicker and more elastic walls because they carry blood at high pressure to withstand the pumping by the heart without getting damaged.</p> Signup and view all the answers

<p>The lumen provides a space where the blood flows within the arteries.</p> Signup and view all the answers

<p>Arteries are located deep inside the body to carry blood under high pressure, and any damage to a major artery can lead to rapid blood loss.</p> Signup and view all the answers

<p>Veins carry deoxygenated (impure) blood back to the heart.</p> Signup and view all the answers

<p>Veins have three layers and a large lumen that provides more space for blood to travel with less resistance.</p> Signup and view all the answers

<p>Veins are located closer to the skin surface as they carry blood under lower pressure, and an injury to a vein would not cause severe bleeding.</p> Signup and view all the answers

<p>Valves in veins prevent the backward flow of blood.</p> Signup and view all the answers