No, this thickening of the uterine wall is not permanent. If the egg gets fertilised, it starts developing and gets embedded in the uterine wall resulting in pregnancy. During pregnancy no more eggs are released and the thickened lining is discharged only when the baby is born. However, if fertilisation does not occur, the released egg and the thickened lining are shed off resulting in menstruation.
Question
In human females, each time during maturation and release of egg the inner wall of uterus thickens. Is this thickening permanent? Give reasons.
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💡 Some Related Questions
Observe the given chart and graph carefully and answer the questions that follow. (i) Which of the line represents the height of boys? (ii) Which line represents the height of girls? (iii) What is the difference between the pattern of increase in the height of boys and girls? (iv) Is this pattern true for each individual?
| Age in years | % of full height | |
| Boys | Girls | |
| 8 | 72% | 77% |
| 9 | 75% | 81% |
| 10 | 78% | 84% |
| 11 | 81% | 88% |
| 12 | 84% | 91% |
| 13 | 88% | 95% |
| 14 | 92% | 98% |
| 15 | 95% | 99% |
| 16 | 98% | 99.5% |
| 17 | 99% | 100% |
| 18 | 100% | 100% |
Open Answer »
John and Radha were classmates since childhood. When Radha became eleven years old, she developed a little swelling on her neck. She visited the doctor who started medication for her. After a few years, John also developed a slight protrusion on his throat. He got worried and went to the doctor. But, the doctor assured him that it was a normal feature in boys while they are growing up. Can you think of any reasons for the difference in diagnosis?
Open Answer »Given below are certain food items required for proper nourishment of adolescents. Name the nutrients present in the food items and write their functions.
| Food items | Major nutrient | Functions | |
| 1. | Pulses and nuts | ||
| 2. | Oranges and amla | ||
| 3. | sugar, roti | ||
| 4. | oils | ||
| 5. | Vegetables |
