The inner ear controls hearing and balance with three main parts: the cochlea, vestibule, and semicircular canals. The cochlea, filled with fluid and tiny hairs, sends sound signals to the brain by ...
The inferior vena cava is a large vein that carries blood from the lower body to the heart. The IVC has no valves, which means that blood is pulled forward by the diaphragm's contraction. Conditions ...
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