808 DIRECTIONS FOB LABORATOEY WORK 



and c, the medulla, coining to the surface at the hilus. Sketch (333). 

 In the cortex note also the corpora lutea and the corpora albicantia. 

 What is their significance? Make h.p. sketches (334, 335) of portions 

 of each. Make h.p. sketch (336) of a typical area of the medulla. 



Sketch h.p. also: a, a primary ovarian follicle (337) ; b, a follicle at 

 an intermediate stage pf growth (338) ; and c, an older vesicular (Graaf- 

 ian) follicle (339), noting all the constituent elements. Manner of 

 derivation of the secondary oocyte from the primary oocyte of the ves- 

 icular follicle? ootid from secondary oocyte? 



(3) Study an injected specimen of a cat's ovary. What is remark- 

 able about the arteries? Sketch (340) an area of the medulla, and an 

 adjacent vesicular follicle. 



(4) Oogenesis. Sketch the several salient stages of oogenesis from 

 a series of demonstration slides of eggs of mouse or starfish: a, unripe 

 (small) ovarian egg (primary oocyte) (314) ; b, ripe (full-grown) 

 primary oocyte (342); c, first maturation spindle (343); d, secondary 

 oocyte with first polocyte (344) ; e, second maturation spindle (345) ; 

 f, ootid or mature ovum with second polocyte (346). 



(B) THE UTERINE TUBE (Oviduct; Fallopian tube; Salpinx). 

 Make a comparative study of transverse sections of the uterine tube 



at: a, the isthmus; b, the ampulla; c, the infundibulum, noting differ- 

 ences in the size of the lumen, and the character and constituents of the 

 three tunics (tunicas mucosa, muscularis and serosa). Diagram (347). 

 Sketch h.p. (348) a segment of the mucosa from the isthmic region. 

 Differential features among uterine tube, ductus def erens and the ureter ? 



(C) THE UTERUS (Metra; Hystera). 



Compare vertical sections through the body and cervix of the uterus. 

 Sketch l.p. (349) a narrow segment of the entire wall from both regions. 

 Enumerate the chief differences. Sketch h.p. : a, the mucosa of the body 

 (350); b, a cervical gland (351). Significance of non-ciliated areas? 

 How many strata in the tunica muscularis ? Which is the stratum vas- 

 culare? How does the resting uterus differ from the menstruating 

 uterus? from the pregnant uterus? How does the human uterus differ 

 in gross form and with respect of the muscular tunic from that of cer- 

 tain common mammals, e.g., dog, cat, etc.? 



(D) THE VAGINA. 



Study l.p. a section from the middle portion of the vagina. Note: 

 a, the tunica mucosa; b, tunica muscularis; c, tunica fibrosa. Sketch 



