168 THE STRUCTURE OF MAN 
G5 loved dy. : 32 cm. 
Up to the 5th year . : 1% 5, 
From 5—10 : j : Oe 
From 10=—20— . : : 93 ,, : 
From 20—30 . , : : 94 ,, | 
From 30—40 . : ; 83 ,, 
From 40—60 : i : Bits 
In old people 61 over 60 ; 8i ,, 
In embryos and new-born children on the one hand, and in 
adults on the other, the vermiform process varies in length in 
Fic. 100.—THE Ca@cuM AND VERMIFORM PROCESS OF A HUMAN EMBRYO. 
References as in Fig. 99. 
proportion to that of the rest of the intestinal canal; and since 
it is a degenerating organ, it is not surprising to find that it is 
most strongly developed in fcetal times, and does not grow at 
a rate proportionate to advancing age. In the embryo its 
length, in proportion to that of the large intestine, is approximately 
one to ten, and in the adult one to twenty. Further lght is 
thrown on these facts by Ribbert’s interesting discovery of the 
frequent occlusion of the vermiform process. He found it either 
partially or totally closed in 25 per cent of the cases examined, 
