408 THE HORSE. 
to lubricate its walls; but in disease this is often increased to an 
enormous extent, ending in dropsy of the chest, or in a collection of pus 
when the membrane is greatly inflamed. The shape cf the thorax ina 
diaphragm. 
12. 12. Posterior surface of the 
13. Trachea, 
14, Lungs 
15. Heart. 
13; 
or 
o 
ach passin 
gus. 
fice of the stom 
gh the diaphragm, 
throu, 
10. Cardiac ori 
11. Pylorus, 
Fic. 2.—LonGiTuDINaL Secrion or Tue THorRax, Ere. 
9. 9. 9. Cisopha 
6. 6. Cervical vertebra. 
7. 7.7.7. Spinal cord. 
5. Tousus, 
8. Pharynx. 
ro) 
a 
3 
a 
a 
Ba8 
om et 
sosg 
sO & 
Beas 
“—"o'o § 
SHAS 
900,8 
O004G 
rao 
longitudinal direction is shown at fig. 2, in which its posterior wall, the 
diaphragm (12 12), is seen separating the stomach (a10, 11) and the 
liver (a small section of the left lobe of which only is left) from the lungs 
