802 DIRECTIONS FOR LABORATORY WORK 



cells proper. From a demonstration preparation according to the Golgi 

 technic or the Vance technic, draw h.p. (278) a cell cord with its inter- 

 and intracellular secretory canaliculi. In a section prepared according 

 to Mallory's technic for connective tissue, study the character of the 

 inter- and intralobular connective tissue. 



(3) Sketch h.p. (279) several types of liver cells: a, granular (with 

 zymogenic and glycogenic granules); b, fatty; c, pigmented; d, binu- 

 cleated. Consider the questions regarding the presence, character, sig- 

 nificance and relation to the bile capillary (ductule) and to the capillary 

 blood supply (in health and in disease, e.g., in jaundice) of the intra- 

 cellular bile canaliculi. 



(4) Sketch h.p. (280) a portal canal (interlobular vein, artery, 

 lymphatic and bile duct) ; a central (intralobular) vein (281) ; a sub- 

 lobular vein (282). Sketch h.p. (283) the area of transition from an 

 intralobular to the interlobular bile duct. 



(5) From an injected specimen of the cat's liver sketch (284) a 

 small area of the parenchyma. Trace the path of the portal and the 

 hepatic blood through the liver. Diagram (285). 



(D) THE GALL BLADDER (Vesica felled). 



(1) Make h.p. sketch (286) through the wall of gall-bladder, noting 

 the constituents of the several tunics. 



XVI. THE URINARY SYSTEM 



(A) THE KIDNEY (Ren). 



(1) From a gross specimen of an adult human kidney divided in the 

 median longitudinal plane, make a sketch (287) to show the general 

 topography. Note : capsule (tunica fibrosa, tunica adiposa) ; cortex 

 (pars radiata, pars convoluta) ; medulla (renal pyramids, renal columns, 

 renal papillae) ; renal sinus (in hilus), containing the renal pelvis (with 

 infundibula or major calyces and the minor calyces). Note also the 

 ureter, and the distribution of the branches of the renal artery and vein 

 in relation to this duct. 



(2) Study l.p. a stained longitudinal section of the kidney of the 

 mouse or rat (or other small mammal). Sketch (288). In capsule 

 note: mesothelium; tunica albuginea; smooth muscle? Define a renal 

 lobule (renculus). How does the adult human kidney differ from that 

 of the fetus and the infant? from that of reptiles? from that of mouse 

 and cat? from that of horse? from that of pig? 



