Answer:
Here, oxygen travels from the tiny air sacs in the lungs, through the walls of the capillaries, into the blood. At the same time, carbon dioxide, a waste product of metabolism, passes from the blood into the air sacs. Carbon dioxide leaves the body when you exhale.
When a blood clot gets caught in one of the arteries that go from the heart to the lungs, it's called a pulmonary embolism (PE). The clot blocks the normal flow of blood. This blockage can cause serious problems, like damage to your lungs and low oxygen levels in your blood.
Explanation:
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