2-D: Short for two-dimensional. This term is an adjective for something in a flat world, meaning it has features that can be described in only two dimensions — width and length.
3-D: Short for three-dimensional. This term is an adjective for something that has features that can be described in three dimensions — height, width and length.
3-D printing: A means of producing physical items — including toys, foods and even body parts — using a machine that takes instructions from a computer program. That program tells the machine how and where to lay down successive layers of some raw material (the “ink”) to create a three-dimensional object.
acupuncture: A therapy that comes from traditional Chinese medicine, it stimulates various points on the body. This is usually done by inserting needles through the skin for a half-hour or more.
bile: A yellowish to olive-green liquid secreted by the liver (and then stored in the gallbladder). When needed, the body releases bile into the small intestine to help digest fatty materials.
biology: The study of living things. The scientists who study them are known as biologists.
biomedical engineer: An expert who uses science and math to find solutions to problems in biology and medicine; for example, they might create medical devices such as artificial knees.
blood pressure: The force exerted against vessel walls by blood moving through the body. Usually this pressure refers to blood moving specifically through the body’s arteries. That pressure allows blood to circulate to our heads and keeps the fluid moving so that it can deliver oxygen to all tissues. Blood pressure can vary based on physical activity and the body’s position. High blood pressure can put someone at risk for heart attacks or stroke. Low blood pressure may leave people dizzy, or faint, as the pressure becomes too low to supply enough blood to the brain.
blood vessel: A tubular structure that carries blood through the…
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