Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
Answer:
Sarcoidosis is an inflammatory disease that affects multiple organs in the body, but mostly the lungs and lymph glands.
Explanation:
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Your chest may hurt because you might have something going on your body.
You might have a itchy throat or you might be sick.
Answer:
the amniotic fluid is nutrients that feed the baby and help it grow
