what role does the male hormone testosterone play in puberty
Testosterone
Growth of spermatogenic tissue in testicles , male fertility , penis or clitoris enlargement , increased libido and frequency of erection or clitoral engorgement . Growth of jaw , brow , chin , nose , and remodeling of facial bone contours , in conjunction with human growth hormone . Completion of bone maturation and termination of growth . This occurs indirectly via estradiol metabolites and hence more gradually in men than women . Increased muscle strength and mass , shoulders become broader and rib cage expands , deepening of voice , growth of the Adam 's apple . Enlargement of sebaceous glands . This might cause acne , subcutaneous fat in face decreases . Pubic hair extends to thighs and up toward umbilicus , development of facial hair ( sideburns , beard , moustache ) , loss of scalp hair ( androgenetic alopecia ) , increase in chest hair , periareolar hair , perianal hair , leg hair , armpit hair . 
Growth of spermatogenic tissue in testicles , male fertility , penis or clitoris enlargement , increased libido and frequency of erection or clitoral engorgement . Growth of jaw , brow , chin , nose , and remodeling of facial bone contours , in conjunction with human growth hormone . Completion of bone maturation and termination of growth . This occurs indirectly via estradiol metabolites and hence more gradually in men than women . Increased muscle strength and mass , shoulders become broader and rib cage expands , deepening of voice , growth of the Adam 's apple . Enlargement of sebaceous glands . This might cause acne , subcutaneous fat in face decreases . Pubic hair extends to thighs and up toward umbilicus , development of facial hair ( sideburns , beard , moustache ) , loss of scalp hair ( androgenetic alopecia ) , increase in chest hair , periareolar hair , perianal hair , leg hair , armpit hair .
Growth of spermatogenic tissue in testicles, male fertility, penis or clitoris enlargement, increased libido and frequency of erection or clitoral engorgement.
 Growth of jaw, brow, chin, nose, and remodeling of facial bone contours, in conjunction with human growth hormone.
Increased muscle strength and mass, shoulders become broader and rib cage expands, deepening of voice, growth of the Adam 's apple.
 Enlargement of sebaceous glands .
Pubic hair extends to thighs and up toward umbilicus, development of facial hair (sideburns, beard, moustache), loss of scalp hair (androgenetic alopecia) , increase in chest hair, periareolar hair, perianal hair, leg hair, armpit hair.
Growth of spermatogenic tissue in testicles , male fertility , penis or clitoris enlargement , increased libido and frequency of erection or clitoral engorgement . Growth of jaw , brow , chin , nose , and remodeling of facial bone contours , in conjunction with human growth hormone . Increased muscle strength and mass , shoulders become broader and rib cage expands , deepening of voice , growth of the Adam 's apple . Enlargement of sebaceous glands . Pubic hair extends to thighs and up toward umbilicus , development of facial hair ( sideburns , beard , moustache ) , loss of scalp hair ( androgenetic alopecia ) , increase in chest hair , periareolar hair , perianal hair , leg hair , armpit hair .