Because it is a secondary sexual character. Responsible for this male protrusion is testosterone , which makes the thyroid cartilage grow, a region full of receptors for this male hormone. Said cartilage is slightly above the thyroid gland, which produces thyroxine and other hormones that regulate a good part of the body. One of the popular names for the nut is Adam's apple, which refers to the episode of original sin narrated in Genesis: Eve's companion would have had a piece of the forbidden fruit stuck in his throat.
Why do only men have walnuts?
Three things that can be found out by measuring the length of your fingers
We review some curious scientific studies that link the length of the fingers with behavioral characteristics or the propensity to suffer from certain diseases.
A safe environment in childhood determines testosterone levels
The study contradicts the theory that testosterone levels are controlled by genetics or race.
Do men with a deep voice have more sperm?
Although women rate deep male voices as 'sexier', subjects with deep voices produce less sperm
New therapy to increase sexual desire in men
New research concludes that exposure to bright light can increase men's libido.
A drop in testosterone would have civilized the man
The main sex hormone of man would have been the protagonist of our species becoming civilized thanks to a general drop in testosterone in our ancestors, according to a study by the University of Utah (USA).