Prenatal Growth of the Human Body, 



157 



TABLE IV. 



Relative Size of Various Fetal Organs (in Percentage of Total Body 

 Volume) in Specimens Observed. 



No. and Sex. 



Crown-rump length 

 Volume of body 



Head 



Upper extremities 

 Lower extremities 



Trunk 



Brain 



Spinal cord 



Thyroid gland . . . . 



Thymus 



Heart 



Right lung 



Left lung . 



Liver 



Spleen 



Pancreas 



Right kidney 



Left kidney 



Right suprarenal . 

 Left suprarenal . . . 



Stomach 



Intestines 



Sex glands 



60(— ) 



1 . 1 cm. 

 . 122 cc. 



44.42% 



2.91 



2.43 

 50.12 

 20.26 



4.85 



3.64 

 .18 

 .18 



4.85 



.0852 



58(f) 



1.7 cm. 

 .4735CC. 



45.76% 



2.13 



2.26 

 49.86 

 22.35 



3.43 



1.71 

 .276 

 .21 



6.91 

 .019 

 .032 

 .044 

 .042 

 .169 

 .172 

 .56 

 .72 

 .112 



57(f) 



185 (f) 



3.1 cm. 4. 5 cm. 

 2.117CC. ! 8.8cc. 



10 



4% 



64 



21 



76 



81 



53 



035 



008 



32 



777 



605 



56 



0088 



0533 



115 



105 



141 



131 



.0357 



148 (m) 



5.8 cm. 

 15.5cc. 



43.18% 41.94% 



4.67 5.87 



5.68 [ 7.61 



I 46.47 44.58 

 I 22.72 18.58 

 1.25 .774 



1.14 

 1.7 

 1.48 

 7.39 



1.06 

 1.26 

 1.03 

 6.45 



197 (f) 



6.2cm. 

 15.5 cc. 



% 



50.9 



.29 

 .355 

 ,258 

 ,258 



,58 

 ,71 



Note. To correct for shrinkage in the first three embryos (which were em- 

 bedded in paraffin), 25 per cent was added to the observed body volumes given in 

 Table I. 



