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parallel
2 or more right lines that extend in the same direction and are equidistant. they will never meet.
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right angle
an angle that meets at 90 degrees
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perpendicular
2 lines that meet at a right angle
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concentric circles
different sized circles having a common center
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eccentric circles
2 circles in the same plane that do not have the same center
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parallax
the apparent displacement of an object when viewed from 2 different points
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meniscus
the curved, upper surface of a liquid column within a container due to a rise along the contact surface.
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capillary action
the effect of liquid being pulled into a fine-bored tube. the smaller the lumen, the greater the capillary action
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density
the amount of mass per unit volume
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refractometer
an instrument used to determine the concentraction or "refractive index" of a substance
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specific gravity
a means of comparing densities to that of water. SG has no units
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unit
a form of measurement
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barrel
part that contains liquid or air
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plunger
structure that is pulled to draw liquid or air into the syringe
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tip or hub
structure that connects the needle to the syringe
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unit markings
are on the barrel, and are usually expressed in ml or cc
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common needle sizes
30g, 25g, 22g, 20g, 18g, 16g,
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