The age at which the *** hormones begin to be produced and the boy and girl become sexually mature (able to reproduce) is called puberty. Females attain puberty at an age of 10-12 years.
Puberty is the time when the juvenile body of a person starts sexual maturation.
Changes such as appearance of pimples on face, growth of thick hair in armpits and genital areas occur in both boys and girls.
The changes observed in boys during puberty are: Hair grows under armpits, pubic region between the thighs, chest and face. Body becomes more muscular due to the development of muscles. The voice deepens. Chest and shoulder broaden. The ***** and testes become larger. Feelings and sexual drives associated with adulthood begin to develop.
The changes observed in girls during puberty are: Hair grows under armpits and pubic region. Mammary glands develop and breasts become enlarged. The hips broaden and extra fat is deposited in various parts of the body like hips and thighs. Fallopian tubes, uterus and ****** enlarge. Ovaries start to release eggs and menstruation starts.
The testes and ovaries are the male and female *** organs which produce *** cells for sexual reproduction in human beings. The function of testes is to make *** cells called sperms and to make *** hormone called testosterone. The function of the ovaries is to make mature female *** cell called ova or egg and also to make female *** hormones called oestrogen and progesterone.
The sexual mode of reproduction means that germ-cells from two individuals have to join together either by the external release of germ-cells from the bodies of individuals, as happens in flowering plants. Or by two individuals joining their bodies together for internal transfer of germ-cells for fusion, as happens in many animals. If animals are to participate in this process of mating, their state of sexual maturity must be identifiable by other individuals. Many changes during puberty, such as new hair-growth patterns, are signals that sexual maturation is taking place.
On the other hand, the actual transfer of germ-cells between two people needs special organs for the sexual act, such as the ***** when it is capable of becoming erect. In mammals such as humans, the baby is carried in the mother’s body for a long period, and will be breast-fed later.
Meghna Thapar 5 years, 3 months ago
The age at which the *** hormones begin to be produced and the boy and girl become sexually mature (able to reproduce) is called puberty. Females attain puberty at an age of 10-12 years.
Puberty is the time when the juvenile body of a person starts sexual maturation.
Changes such as appearance of pimples on face, growth of thick hair in armpits and genital areas occur in both boys and girls.
The changes observed in boys during puberty are: Hair grows under armpits, pubic region between the thighs, chest and face. Body becomes more muscular due to the development of muscles. The voice deepens. Chest and shoulder broaden. The ***** and testes become larger. Feelings and sexual drives associated with adulthood begin to develop.
The changes observed in girls during puberty are: Hair grows under armpits and pubic region. Mammary glands develop and breasts become enlarged. The hips broaden and extra fat is deposited in various parts of the body like hips and thighs. Fallopian tubes, uterus and ****** enlarge. Ovaries start to release eggs and menstruation starts.
The testes and ovaries are the male and female *** organs which produce *** cells for sexual reproduction in human beings. The function of testes is to make *** cells called sperms and to make *** hormone called testosterone. The function of the ovaries is to make mature female *** cell called ova or egg and also to make female *** hormones called oestrogen and progesterone.
The sexual mode of reproduction means that germ-cells from two individuals have to join together either by the external release of germ-cells from the bodies of individuals, as happens in flowering plants. Or by two individuals joining their bodies together for internal transfer of germ-cells for fusion, as happens in many animals. If animals are to participate in this process of mating, their state of sexual maturity must be identifiable by other individuals. Many changes during puberty, such as new hair-growth patterns, are signals that sexual maturation is taking place.
On the other hand, the actual transfer of germ-cells between two people needs special organs for the sexual act, such as the ***** when it is capable of becoming erect. In mammals such as humans, the baby is carried in the mother’s body for a long period, and will be breast-fed later.
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