Question

pre - video question: what does the root elementscler/o -mean? hardness artery abnormal condition vein

Explanation:

The root element 'scler/o -' is a common medical root. In medical terminology, roots are combined with prefixes and suffixes to form medical terms. 'Scler/o -' specifically refers to hardness. For example, in the term'sclerosis', which means hardening (of a tissue, often seen in conditions like arteriosclerosis where arteries harden).

Answer:

hardness