B. Write notes on.
Adams apple. b) Secondary sexual characters.
Answers
Adams apple means it occurs in the front of the neck.
Answer:
The notes are as follows :
( a ) Adam’s apple: In human males, the larynx grows larger during puberty and can be seen as a protruding part of the throat. This protrusion is known as the Adam’s apple. In boys, under the influence of sex hormones, the larynx becomes prominent. As a result, the vocal cords become longer and thicker, causing the voice to become hoarse. However, in females, the larynx is of a small size and is hardly visible. Therefore, girls have a high-pitched voice, while the voice of boys is low- pitched.
( b ) Secondary sexual characters are those features that help in distinguishing the male and the female body from each other. They are physical or behavioural characteristics that appear in humans at the time of puberty.
Secondary sexual characters in boys:
- Appearance of moustache and beard.
- Appearance of chest hair.
- Growth of hair in genital area and other parts of the body.
Secondary sexual characters in girls:
Increase in breast size and darkening of the skin of nipples present at the tip of the breasts.
Growth of hair in genital area and other body parts.
Explanation: