Презентация, доклад по биологии Вторичные половые признаки 8 класс

secondary sexual characteristics during puberty

of youths and girls. Biological and social maturity.

Learn: to describe development secondary sexual characters in the period of pubescence.

inevitable moment in life of everybody.
Now children develop quicker. And for them a juvenile period (or pubescence) begins before in 10-11.
Thus for girls and for boys development of pubescence begins on anything.
For girls he even begins before pubescence. And for boys vice versa delay of maturing. On the average the period of pubescence lasts 5-6.

background. Mostly an enormous role is played by heredity.

an identical form of body and height approximately.

Masculine sexual characters

Woman sexual characters

Shoulders change small

Shoulders become wider

Thighs change small

Thigh become wider

of problem skin :
on face and sometimes and on a body pimple and acnes begin to come forward. This fully normal phenomenon, but not at all is. Thus, an organism shows work of producing hormones.