The blood vessels which carry the blood from heart to different parts of the body are called arteries. The system consisting of arteries is called arterial system.
It starts from truncus arteriosus. It is divided into two main branches each of which further divides to form three small branches.
It supplies blood to lower jaw, tongue, eye and brain.
It carries blood to lungs and skin.
Right and left systemic arches joint posteriorly to form dorsal aorta. But prior to their union, each systemic arch gives out arteries supplying blood to vertebral column, oesophagus and fore limbs.
It runs along the vertebral column towards hind limbs. It gives off following branches.
It supplies blood to digestive system.
These supply blood to kidneys and general organs.
posterior mesenteric artery of a frog
It supplies blood to rectum.
Iliac arteries function
These supply blood to hind limbs of their sides.
After reaching their specific organs, all the arteries divide and redivide to form capillaries. The walls of capillaries are very thin. Due to this reason, the exchange of materials take place between blood and tissues. The capillaries join to form venules. These venules join to form veins. Then these veins carry blood back to heart.