LINK / CITE ADD TO WORD LIST. noun. The definition of an organelle is a structure in a cell with a specific function. An example of an organelle is a centriole.oun. A differentiated structure within a cell, such as a mitochondrion, vacuole, or chloroplast, that performs a specific function. New Latin organella, diminutive of Medieval Latin organum, organ of the body, from Latin, implement, tool; see organ.
Urine Test Overview. Urinalysis, also called a routine urine test, is used to check for abnormalities in the urine.Urine is liquid waste, which is made by the kidneys and stored in the bladder until it is eliminated by the body through urination. A number of diseases and conditions can result in abnormalities in the urine.
1 A creatinine urine test evaluates how well your kidneys are working by measuring the amount of creatinine in your urine.  A urine 24-hour volume test is the most common type creatinine urine test. Since the urine 24-hour volume test simply involves urination, there are no associated health risks or side effects.