Which particular factors that earlier may have been somewhat weak in bringing about national health insurance later led to the passage of medicare and medicaid?

The growing elderly population, which was a politically active force in the middle-class.

Medicare and Medicaid did not plan on how the majority of Americans would receive health care.

Explanation:

The two factors that led to the passage of Medicare and Medicaid were:

The growing population of elderly people, that was a political force in the middle class. They claimed for health care coverage. The fact that Medicaid and Medicare were originally designed for vulnerable populations and not considering how the majority of Americans would receive health care.

Ithink it true i might be wrong so don't take my word that its true.

1.controls blood flow2.controls oxygen flow3.carries oxygen rich blood to veins