_1 R._, First thoracic vertebra; _1 L._, first lumbar vertebra; _2
K._, second sacral spine; _S._, scapula; _A._, humerus; _St._,
sternum; _B._, ilium; _O._, femur; _L._, right lung; _H._,
pericardium; _Z._, diaphragm (pars costalis); _r.v.C._, right
ventral colon; _v.Q._, sternal flexure of colon; _d.Q._,
diaphragmatic flexure of colon; _C._, body of cæcum; _C′._, base of
cæcum; _C″._, apex of cæcum; _D._, small intestine; _F._, pelvic
flexure of colon; _M._, rectum; _a._, abdominal wall in section;
_b_, duodenum; _c_, coccygeus muscle; _d_, retractor ani; _e_, _e′_,
sphincter ani externus; _f_, anterior gluteal artery; _g_, internal
pudic artery; _h_, xiphoid cartilage. (After Ellenberger, in
Leisering’s Atlas.)
]
=Vessels and Nerves.=—The cæcal arteries come from the great mesenteric
artery. The veins go to the portal vein. The nerves are derived from the
great mesenteric plexus of the sympathetic.