Examlex
How many valence electrons surround the xenon atom in xenon tetrafluoride (XeF4) ?
Atria
Chambers of the heart that receive blood from the veins and circulate it to the ventricles.
Pulmonary Veins
Blood vessels that carry oxygenated blood from the lungs back to the left atrium of the heart.
Oxygenated Blood
Blood that has been enriched with oxygen by the lungs and is circulated by the heart to the rest of the body.
Ventricles
Cavities within the brain that produce and contain cerebrospinal fluid, or chambers in the heart that receive or pump blood.
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