The middle layer of the walls of veins differs from arteries in that option(c)i.e, it contains less smooth muscle,
In arteries than in veins, the middle layer (tunica media) is thicker and contains more contractile tissue. Elastic fibers organized in circles, connective tissue, and smooth muscle cells make up this structure. Helium atoms are created when the protons of colliding hydrogen atoms fuse.
The middle layer, known as the tunica media, is often the thickest layer and is mostly made up of smooth muscle. It not only supports the vessel but also alters the vessel's width to control blood pressure and flow. The walls of arteries are thicker. Have more elastic fibres and smooth muscle. are more durable. The direction of blood flow distinguishes arteries from veins (out of the heart through arteries, returning to the heart through veins).