THE GENITAL ORGANS. 139 



cosa is thicker, is beset with papillae,, and its surface is lined with 

 stratified squamous epithelium. The muscular coat is dense and ia 

 disposed in three layers inner, middle, and outer with an inter- 

 mingling of blood-vessels, nerves, lymphatics, and areolar tissue. 



THE VAGINA. This structure possesses a mucosa, sub-mucosa. 

 and muscular and serous coats. The mucosa is studded with papil- 

 lae, and is lined with stratified squamous epithelium ; the sub-mucosa 

 consists of fibrous bundles and elastic fibres; the muscular coat is 

 in two layers; the serous coat comprises elastic fibres and endo- 

 thelium. 



The mammary glands are sebaceous racemose glands, consisting 

 of lobes, lobules, and acini, with ducts, connective tissue, and areolar 

 and adipose tissues. 



Laboratory exercise No. 44. The ovary. Harden in alcohol, embed 

 in paraffin, and stain with haematoxylin and eosin. Demonstrate the 

 following-: Cortex, composed of tunica albuginea, stroma, Graafian folli- 

 cles, and corpus luteum; the medulla, consisting 1 of the stroma and 

 blood-vessels. Make a study of a Graafian follicle, noting the theca 

 folliculi, membrana granulosa, discus proligerus, and ovum. Focus with 

 H. P. upon a ripe ovum and observe the vitelline membrane, vitellus, 

 germinal vesicle, and germinal spot. Drawings. 



Laboratory exercise No. 45. Fallopian tube and uterus. These may 

 be hardened in alcohol, embedded in paraffin, and stained with lithium 

 carmine, method No. 3. Make out (and illustrate in your diagrams) four 

 characteristic differences between these organs. How are the cilia dis- 

 posed? 



MEMORANDA. 



