Question

<!--br {mso-data-placement:same-cell;}--> Give atleast 3 structural differences between an artery and a vein

Answer 1

<!--br {mso-data-placement:same-cell;}--> Arteries
1. Progressively branched, decreasing in size
2. Have thick, elastic and more muscular walls
3. Have no values in their inner lining

Veins
1. Progressively unite increasing in size
2. Have thin, non-elastic and less muscular walls
3. Have valves in their inner lining to prevent the backward flow of blood