Q. 233.9( 7 Votes )
In human females, each time during maturation and release of the egg the inner wall of the uterus thickens. Is this thickening permanent? Give reasons.
Answer :
No, the thickening of uterus lining is not permanent. It gets thickened to receive the fertilized egg but if the egg is not fertilized the inner lining sheds off. Blood along with mucus, an unfertilized egg is released out through menstrual flow. But if the egg is fertilized the uterus receives the zygote and supplies nourishment through the blood vessels. Till the complete development of the foetus in the uterus it provides nutrients, oxygen to the growing fetus. After the baby is born it sheds off.
Rate this question :






















Which of the two has a shorter reproductive phase of life: men or women?
Lakhmir Singh & Manjit Kaur - ScienceWhich of the following can lead to menstruation in a 21 year old woman during ovulation?
A) Sperms available for fertilization
B) Oviducts blocked
C) Sperms not available for fertilization
D) Oviducts not blocked
Lakhmir Singh & Manjit Kaur - ScienceDefine (i) menarche, and (ii) menopause.
Lakhmir Singh & Manjit Kaur - ScienceWhat name is given to the onset of menstruation in human females (or girls)? At what age does this occur?
Lakhmir Singh & Manjit Kaur - ScienceState one situation (other than menopause) when ovulation and menstruation stop in a woman.
Lakhmir Singh & Manjit Kaur - ScienceDescribe menstrual cycle. What is the duration of menstruation cycle in women?
Lakhmir Singh & Manjit Kaur - Science