Examlex
When it comes to basic commodities, the United States is a net exporter of oil and metals and a net importer of farm crops.
Oxygen
A chemical element essential for respiration in most living organisms and used in various industrial applications; it is the most abundant element in the Earth's crust.
Maternal Serum Screen
A blood test performed on pregnant women to evaluate the risk of certain birth defects or chromosomal abnormalities in the fetus.
Blood
A vital liquid in humans and animals that delivers necessary substances such as nutrients and oxygen to cells, and transports metabolic waste products away.
Mother's Blood
The blood circulating in a pregnant woman that provides nutrients and oxygen to the developing fetus.
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