Question

I will mark brainliest for right answers.
Scientists have found that a spell of hearty laughter causes the tissue, that forms the inner lining of blood vessels, the endothelium to dilate, and subsequently increases the blood flow in the same way as a bout of aerobic exercise. This finding adds evidence that a laugh a day may help keeping the heart attack away. Find a pair of synonyms in this. ​

Answer 1

Answer:

It's dilate and increase