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Developing countries fall into two categories, moderately developed and less developed. Which of the following is not classified as a less developed country?
Hormones
Chemical messengers produced by glands in the endocrine system, traveling through the bloodstream to target organs, affecting various physiological processes and behaviors.
Epithelial Cells
Cells that line the surfaces of the body, including skin, blood vessels, urinary tract, and organs, serving as a barrier and creating an interface with the environment.
Stem Cells
Undifferentiated cells with the potential to develop into many different cell types in the body, serving as a repair system for tissues.
Glands
Organs in the body that secrete hormones or other substances directly into the blood or onto a surface within or outside the body.
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