Testosterone is a hormone found in both males and females, but it is present at much higher levels in males. It is produced mainly in the testes in males and in smaller amounts by the ovaries and adrenal glands in females. Testosterone plays a key role in developing male secondary sexual characteristics, such as facial hair, a deeper voice, and increased muscle mass during puberty. It is also important for the production of sperm and for maintaining bone strength and overall health in both sexes. In GCSE Biology, it is important to understand that hormones like testosterone act as chemical messengers that help control different functions and changes in the body as we grow and develop.
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