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Testosterone is the primary male sex hormone and androgen in males. [3] In humans, testosterone plays a key role in the development of male reproductive tissues such as testicles and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.
A peacock displays his long, colored tail, an example of secondary sex characteristics. An adult human's Adam's apple, a visible secondary sex characteristic common in males. A secondary sex characteristic is a physical characteristic of an organism that is related to or derived from its sex, but not directly part of its reproductive system. [1]
Testosterone secretion by the interstitial cells of the testes then causes the growth and development of the mesonephric ducts into male secondary sex organs. [7] The Müllerian ducts atrophy, but traces of their anterior ends are represented by the appendices testis ( hydatids of Morgagni of the male), while their terminal fused portions form ...
Testosterone is produced by interstitial cells, also known as Leydig cells, which reside adjacent to the seminiferous tubules. Seminiferous epithelium is sensitive to elevated temperature in humans and some other species, and will be adversely affected by temperatures as high as normal body temperature.
Secondary sex characteristics in non-human animals include manes of male lions, long tail feathers of male peafowl, the tusks of male narwhals, enlarged proboscises in male elephant seals and proboscis monkeys, the bright facial and rump coloration of male mandrills, and horns in many goats and antelopes.
Testosterone is an essential hormone for both men and women, playing an important role in muscle growth and cognitive function. Low levels of the hormone can lead to changes in mood, cognition and ...
Researchers say higher testosterone levels in men under age 65 who are overweight or have obesity can help lower the risk of developing type 2 diabetes
Dihydrotestosterone (DHT) is a metabolite of testosterone, and a more potent androgen than testosterone in that it binds more strongly to androgen receptors. It is produced in the skin and reproductive tissue. A4 and testosterone can also have an extra hydroxyl (-OH) or keton (=O) group bound on position 11.