T. S. of Uterus

 

T. S. of Uterus

Uterus is hollow pear shaped thick walled structure present between vagina and fallopian tube.

It consists of fundus, corpus and cervix.

2. Histologically the wall of the uterus shows three layers

1) Primetrium or Serosa

 2) Myometrium or muscularis

3) Endometrium or mucosa.

1. Primetrium or serosa: it is the outer most protective coat forming the broad ligament through which blood vessels, lymphatics and nerves reach the uterus

2. Myometrium or muscularis: this is the middle muscular coat of uterus. it is very thick layer consists of smooth muscle fibers, connective tissue and large  blood vessels.

it consists of three sets of muscle layers and accordingly they are called as outer longitudinal muscle, middle oblique muscle and inner circular muscles.

Oxytocin hormone secreted by pituitary gland control the movement of these muscles.  

3. Endometrium or mucosa: it is the innermost layer of uterus occupies major portion of lumen of the uterus. The endometrium consists of two membrane.

a. Inner Endometrium functionalis

b. Outer Endometrium basalis.

a. The endometrium functionalis lined by mucosal epithelium lined by simple columnar ciliated epithelium and underlying submucosa. Endometrium functionalis undergoes cyclic changes during menstruation.

The stroma of uterine wall consists of simple tubular uterine glands.  

b. Endometrium basalis: this is the region of uterus remain unchanged during disruptive phase of sex cycle or menstrual cycle.