a) I) Arteries
-Thick muscular walls
_ No valves (except at bases of pulmonary artery and aorta)
-Narrow lumen
-Elastic walls
II) Veins
-Thin less muscular walls
-Have valves at regular intervals
-Wide lumen
-Less elastic walls
b) Arterioscerosis
johnmulu answered the question on May 3, 2017 at 07:46
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