A. What is the average age at which uterine cycles begin? At about what age do they end?
B. How long is 1 uterine cycle (number of days)? The ovarian and uterine cycles are coordinated – explain how.
C. Name the 3 layers in the uterine wall, starting with the innermost layer. What type of tissue is each layer made of and what is the function of each layer?

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.