The artery which supplies blood to the diaphragm is known as:

Arteries are best defined as vessels that:

Exchange of materials between blood and tissue fluid occurs through

This layer is more thickened in an artery than in a vein,so the lumen is small in an artery.

How does an artery differ from a vein due to the presence of which of the following?

The figure shows blood circulation in humans with labels $A$ to $D.$ Select the option that correctly identifies the label and the functions of the part.