Fig. 6 Portion of a section of the suprarenal gland of a normal albino rat 
(J 1.1) three weeks old. Zenker fixation, paraffin section stained with hema- 
toxylin-eosin. Most of the middle cortical zone is omitted. F, fibrous capsule; 
O, outer zone (glomerulosa), one cell in mitosis; 7’, transition band, nearly lipoid- 
free; Mo, outer part, and M7, inner part of middle zone (fasciculata); 7, inner 
zone (reticularis); M, medulla. X 300. 
Fig. 7 Portion of a section of the suprarenal gland of an albino rat (S 7.31) 
held at constant body weight by underfeeding from three to ten weeks of age. 
For explanations, see figure 6. Progressive differentiation of lipoidal vacuoles 
in the outer zone (O) and of pigment (P) in the inner zone (J). Some cell 
atrophy, with hyperemia and increased degeneration in the inner zone. X 300. 
Fig. 8 Portion of a section of the suprarenal gland of a normal albino rat 
(St 7.45) ten weeks of age. For explanations, see figure 6. This represents the 
normal adult structure. Lipoidal vacuoles well marked in the outer zone (OQ) 
and outer part of the middle zone (Mo), but rare in the transition band (7). 
One pigment mass (P) visible. > 300. 
Fig. 9 Portion of a section of the suprarenal gland of an adult albino rat 
(J 1.5) subjected to chronic inanition for five weeks. For explanations, see 
figure 6. The lipoidal vacuoles have disappeared, except in the outer zone 
(O). Marked atrophy with nuclear and cytoplasmic degeneration in the inner 
cortical zone (J). Three pigment masses (P) visible. X 300. 
Fig. 10 Longitudinal section of the suprarenal gland in an adult albino rat 
(F 9.3) after ten days of acute inanition. Fixation in Miiller’s fluid; frozen 
section (unstained). Normal chromaffin reaction in the medulla, which in this 
case extends to the surface at the hilus. X 80. 
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