Examlex
The bending of light rays as they pass from one medium to another is called refraction.
Tissues
Groups of similar cells that perform a common function in the body, such as muscle, nerve, epithelial, and connective tissues.
Organ
A collection of tissues within a living being that are specialized to carry out a particular task.
Nitrogenous Wastes
Waste products containing nitrogen that result from the metabolism of proteins and nucleic acids, such as urea and ammonia.
Urinary System
The body's drainage system for the removal of urine, comprised of the kidneys, ureters, bladder, and urethra.
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