Question

Name the structures present in both veins and lymph ducts and absent in arteries

Answer 1

Both veins and lymph ducts have valves to prevent back flow of blood but arteries do not have valves.

Answer 2

Lymph ducts and veins both have valves to prevent the back flow of blood ( with the exception of the pulmonary vein) unlike arteries ( because the heart pumps blood into the arteries and so back flow does not occur). Again, the exception is the pulmonary artery.