Primary sex characteristics are those directly related to the sex organs. In males, the first stages of puberty involve growth of the testes and scrotum, followed by growth of the penis. At the time that the penis develops, the seminal vesicles, the prostate, and the bulbourethral gland also enlarge and develop. The first ejaculation of seminal fluid generally occurs about one year after the beginning of accelerated penis growth, although this is often determined culturally rather than biologically, since for many boys first ejaculation occurs as a result of masturbation. Boys are generally fertile before they have an adult appearance. COUNT 5
QSN1 What activity often results in a boy's first ejaculation? ANS1 masturbation QSN2 What are primary sex characteristics? ANS2 those directly related to the sex organs QSN3 What does the first stage of puberty involve for males? ANS3 growth of the testes and scrotum QSN4 After growth of the testes and scrotum, while male body part experiences growth next? ANS4 penis QSN5 Which male body parts enlarge and develop at the same time as the penis? ANS5 seminal vesicles, the prostate, and the bulbourethral gland