become weak | 0.43 |
get thicker | 0.36 |
enclose internal region | 0.35 |
lose their elasticity | 0.34 |
consist of endothelium | 0.31 |
occur with formation of… | 0.25 |
seal shut | 0.25 |
reduced in addition | 0.39 |
thickened | 0.28 |
trimmed | 0.25 |
indicated by arrow | 0.25 |
stretched | 0.16 |