On a long transcontinental flight, a middle-aged man gets up and exercises in the aisle, moving his hands, feet, arms, and legs as much as he can. he does this every two hours. the flight attendant asks him to sit down, but he explains that he is trying to prevent a very dangerous medical condition. he is talking about:

Deep vein thrombosis, or DVT

Explanation:Deep vein thrombosis, or DVT,is a condition that results from a blood clot which occurs in a vein deep within the body. Usually it occurs in lower leg or thigh and may result to swelling which is referred to as thrombophlebitis.

It can affect the lungs when it breaks to the whole body and my cause pulmonary embolism in the lungs.

It may be caused by certain medical conditions,or if you sit without any movement for a long time such as sitting in an airplane.

because he was a christian?

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.