Syncope is due to a temporary reduction in blood flow and therefore a shortage of oxygen to the brain. This leads to lightheadedness or a black out episode, a loss of consciousness. Non-cardiac causes: Syncope is most commonly caused by conditions that do not directly involve the heart.
Metric system basics. The simplicity of the metric system stems from the fact that there is only one unit of measurement (or base unit) for each type of quantity measured (length, mass, etc.). The three most common base units in the metric system are the meter, gram, and liter.The meter is a unit of length equal to 3.28 feet; the gram is a unit of mass equal to approximately 0.0022 pounds (about the mass of a paper clip); and the liter is a unit of volume equal to 1.05 quarts.he three most common base units in the metric system are the meter, gram, and liter. The meter is a unit of length equal to 3.28 feet; the gram is a unit of mass equal to approximately 0.0022 pounds (about the mass of a paper clip); and the liter is a unit of volume equal to 1.05 quarts.
CSS Units. CSS has several different units for expressing a length. Many CSS properties take length values, such as width, margin, padding, font-size, border-width, etc. Length is a number followed by a length unit, such as 10px, 2em, etc. A whitespace cannot appear between the number and the unit. However, if the value is 0, the unit can be omitted.