Examlex
Almost all the oxygen in Earth's atmosphere is unique among the planets in our solar system.
Complications
Unexpected problems or conditions that arise during or after a medical procedure, treatment, or illness, making the situation more difficult to manage.
Pulmonary Vein
A blood vessel that carries oxygenated blood from the lungs back to the left atrium of the heart.
Superior Vena Cava
A large vein that carries deoxygenated blood from the upper half of the body to the heart.
Inferior Vena Cava
The large vein that carries deoxygenated blood from the lower and middle body into the right atrium of the heart.
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