482 



MAMMALS. PHYLUM CHORDATA 



smaller and the Ccccum very much smaller (Fig. 372) i the left 

 superior vena cava (or innominate vein) joins that of the right side 



ILEO-COLIS ARTERY 

 ILIAC BRANCH 



v.s. 



Fig. 372. — The caecum and neighbouring structures in man. — From Cunningham. 



I, Ileum ; 2, colon ; 3, caecum ; 4, appendix. 



before the latter enters the heart, forming thus a single superior 

 vena cava ; the external and internal iliac veins on each side 

 join to form a common iliac ; the fibres of 

 the depressor branch of the tenth nerve are 



I J included in the main 



vagus trunk ; there is a 



single pair of mammae, 



which are on the 



thorax ; the uterus is 



a single median struc- 

 ture (Fig. 373) ; the 



testes descend into an 



external scrotum ; a 



seminal vesicle opens 



into the hinder end of 

 Fig. 373-^^ diagram of ^ach vas deferens (Fig. 



the human uterus in 374) ; and the third 



MfhelitaranS^s eyelid is represented 

 the Fallopian tubes only by a slight semi- 



have been cut away. , r u r 



-From Cunningham, l^nar fold of mem- 



I, Lateral angle of -uterus ; 2, braUC, thc pHca 

 ravity of body; 3, cavity ., 



of cervix ; 4, vaginal cavity. SCmilUnariS. 



amp. — 



Fig. 374. — The lower 

 end of a vas (or duc- 

 tus) deferens of man, 

 with its seminal 

 vesicle. — From Cun- 

 ningham. 



amp., ' Ampulla ' of vas defer- 

 ens ; d.ej., ductus ejacula- 

 torius ; v.s., vesicula 

 seminalis. 



