Question

Name the structures which are present in veins and lymph ducts and absent in arteries.

Answer 1

1. The structures that are present in the veins and lymph ducts are VALVES. 

2. These are absent in arteries.

3. They are one-way valves. If the blood moves in the opposite direction, the valves closed and avoid the backward flow of blood in veins and lymph ducts.