THE GENITAL ORGANS. 



137 



structure are of the compound tubular variety. The excretory duct 

 from each opens into the urethra. 



THE PENIS. The two corpora cavernosa and the corpus 

 spongiosum enter into the structure of this organ. The corpus 

 cavernosum consists of a fibrous sheath, trabeculae of connective tis- 

 sue, and smooth muscle. The corpus spongiosum resembles in struc- 

 ture the corpus cavernosum, but its connective tissue is more deli- 

 cate. 



Laboratory exercise No. 43. Testis. Harden in alcohol, embed in 

 paraffin, and stain with lithium carmine, method No. 3. Demonstrate 

 from your section the investing tunics (vaginalis, albuginea, and vascu- 

 losa), lobules, septa, interlobular connective tissue, parietal cells, 

 mother cells, spermatoblasts, and spermatozoa. Drawings. 



II. FEMALE REPRODUCTIVE ORGANS. 



The female reproductive organs are the ovary, parovarium, Fal- 

 lopian tubes, uterus, vagina, genitalia, and mammary glands 



THE OVARY. 



The ovaries correspond to the testes, are oval -shaped, and are 

 situated one on each side of the uterus. The following outline ex- 

 hibits their structure : 



OUTLINE OF THE OVARY. 



Cortex . . 



Medulla. . 



{ Tunica albuginea. 



Strom a. 



Graafian follicles. \ 



f Theca folliculi. 

 Membrana granulosa. 

 Discus proligerus. 



Corpus luteum. 

 Stroma. 

 Blood vessels. 



f Zona pellucida. 



I Vitelline membrane. 



t Ovum \ Vitellus. 



I Germinal vesicle. 

 [ Germinal spot. 



The tunica albuginea is a serous coat derived from the peri- 

 toneum. The cortex includes the outer one-third of the ovary ; and 

 the medulla, the inner two-thirds. The stroma is the connective tis- 

 sue ground substance. It contains numerous spindle-cells and occurs 

 in both medulla and cortex. The characteristic structures of the 



