THE EGG 



Fig. 12. Block diagram showing construction of the lining of the 

 uterus (endometrium). At A the uterus is represented as if cut in two 

 lengthwise, to show its lining. At B is shown a block cut from the uterus ; 

 a small part of this is represented at C, turned so that the inner surface 

 of the endometrium is upward, showing the glands. At D a small part 

 of C is drawn still more enlarged, to show that the glands are really 

 cell-lined tubes dipping down from the surface epithelium. 



i 63 } 



