Question

list any 2 changes during adolescence​

Answer 1

Adolescence

The period of life when the body undergoes changes, leading to reproductive maturity is called adolescence.

Puberty

The age at which the sex hormones and sex gametes begin to be produced and a boy or a girl becomes sexually mature to reproduce is called puberty.

Changes at occur during adolescence:-

• Increase in height.
• Change in body shape.
• Change in voice
• Increased activity of sweat and sebaceous glands.
• Development of sex hormones.

Increase in height:- During puberty, there is a sudden increase in height of both boys and girls. This increase in the height is due to some factors such as:-

• Inheritance
• Nutrition

Change in body shape:- Many changes occur in body shape during puberty. These changes are different for boys and girls.

• In boys, shoulders become broader and the chest becomes wider. The body muscles grow more prominently than in the girls. So, the body of boys looks more muscular.
• In girls, hips gain weight and the region below the waist (Pelvic region) becomes wider. The development of breasts also begins during their period.

Change in voice:- At puberty the voice box (larynx) begins to grow. Boys develop larger voice boxes. The growing voice box in boys can be seen from outside in the neck i.e. Adam's apple. Girls are having high pitched voice and boys are having low pitvhed voices.

Increased activity of sweat and sebaceous glands:- In human beings the skin has two important glands i.e. sweat glands and sebaceous glands. Sweat glands produce sweat and sebaceous glands produce oil and sebum, which keeps the skin oily.

Development of sex hormones:- The male sex hormones like testes develop completely in boys. Testes start producing the male gametes called sperms. In females sex hormones like ovaries, oviducts and uterus enlarge and develop completely.

Answer 2

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