A deficiency in the diet of the element Iodine [I] can lead to goiter. This is why in the U.S. we placed more of it in all table salt ("iodized salt").
the answers I put is wrong
The sled with a rough metal bottom would take more force to move over ice, because the rough surface would increase friction and the force needed.
Pillow Talkin by Lil Dicky explains it all
Explanation:
because the pressure exerted by artery is more than that of vein due to its narrow lumen and thick walls...causing it difficult to clot.