Question

A. What is the average age at which uterine cycles begin? At about what age do they end?

Answer 1

Answer:

A.  uterine cycle begins at an average age of 12 years when the  gril gets her first period and ends at an age of 53 on an average and this stage called a menopause.

B. it varies in woman and lasts from 2 to 7 seven days after every 21 to 35 days.  

The ovarian and uterine cycles are tightly regulated and coordinated. the hormones which are released during ovarian cycle by the ovary will play important role in uterine lining during the uterine cycle.  

C. 3 layers in the uterine wall

endometrium---the innermost layer made up of connective tissue that help in the prevention of adhesion between the layers and maintenance of patency of the uterine cavity.

,myometrium, the middle layer  made up of smooth muscle tissue that functions in induction of contraction of uterine activity.

perimetrium, the outer most layer made up of connective tissue which plays a role of protection of the uterus from friction.