_1R._, First thoracic vertebra; _1L._, first lumbar vertebra; _2K._,
second sacral spine; _S._, scapula; _A._, humerus; _B._, ilium;
_F._, femur; _Sch._, pubis; _Si._, ischium; _L._, liver (left lobe);
_Ma._, stomach, the posterior contour of which is indicated by
dotted line _x_; _Mi._, spleen; _l.N._, left kidney, concealed part
indicated by dotted line; _M._, small colon; _D._, small intestine,
parts of which have been removed; _l. d. C._, left dorsal colon;
_l.v.C._, left ventral colon; _v.Q._, sternal flexure; _d.Q._,
diaphragmatic flexure; _O._, left ovary; _U._, cornu uteri; _L.1._,
broad ligament; _M′._, rectum; _V._, vagina; _H._, bladder; _a_,
left ventricle; _a′_, right ventricle; _b_, left coronary artery
with descending (_b′_) and circumflex (_b″_) branches; _c_, left
auricle; _d_, pulmonary artery (cut); _e_, aorta; _f_, ligamentum
arteriosum; _g_, brachiocephalic trunk (anterior aorta); _h_,
trachea; _i_, œsophagus; _k_, left phrenic nerve; _l_, diaphragm in
median section; _m_, Fallopian tube; _n_, bursa ovarica; _o_,
urethra; _p_, cut edge of broad ligament; _q_, line of reflection of
pelvic peritoneum; _r_, recto-coccygeus; _s_, so-called suspensory
ligament of rectum; _t_, sphincter ani internus; _u_,
sacro-coccygeus inferior; _v_, abdominal wall in section; _w_,
xiphoid cartilage. (After Ellenberger, in Leisering’s Atlas.)
]
The ventral portions of the colon have four longitudinal =muscular
bands= (Tæniæ) which produce four rows of sacculations (Haustra). On the
first part the external and internal bands are free; the dorsal band is
covered by the adhesion to the overlying dorsal division, while the
ventral band is largely covered by the adhesion to the cæcum. On the
left ventral part the external and ventral bands are free; of the two
dorsal bands, the inner one is concealed by the mesocolon, the outer one
is chiefly free. The pelvic flexure has a band on its lesser curvature,
which is continued on to the third part, concealed by the peritoneal
attachment; these parts are practically non-sacculated. Near the
diaphragmatic flexure two other bands appear, so that the flexure has
three bands; two of these are dorsal and free, the third is ventral and
concealed. The last part has three bands, of which the inner and outer
ones are free, the ventral one covered.