Masculinity - Manliness

…The activity of the gonads begins around puberty, and the sex hormones act on the direct target organs of the body: the penis, scrotum, prostate, and seminal vesicles in boys, and the uterus, fallopian tubes, vagina, and labia in girls, promoting their development. On the other hand, they act on the skeletal muscles and vocal cords of boys as a systemic effect, leading to the completion of secondary sexual characteristics (masculinity). Secondary sexual characteristics (femininity) in girls are represented by the development of breasts and the deposition of subcutaneous fat, and the distribution of pubic hair differs from that in boys. …

*Some of the terminology that mentions "masculinity" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…思春期ころから性腺の活動が始まり，性ホルモンの直接標的臓器である，男子の陰茎，陰囊，前立腺，精囊，女子の子宮，卵管，腟，陰唇に作用して発育を促す。一方，全身作用として男子の骨格筋，声帯などに働き，二次性徴(男らしさ)の完成をもたらす。女子の二次性徴(女らしさ)は乳房の発達，皮下脂肪の沈着などで代表され，陰毛の発生分布状態は男子と異なる。…

※「男らしさ」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報