48 PEACTICE OF EQUINE MEDICINE. 



How does death from apnoea occur ? 



In acute lung diseases the air cannot pass down ; here venous 

 blood circulates in the arteries. In tympanitic colic the gas presses 

 the diaphragm against the Inngs and shuts out the air. 



Death beginning at the brain takes place how? 



It takes place by coma, which means a deeja sleep. In coma 

 the function of the brain is suspended and causes secondary trouble, 

 as the want of contraction of the chest-walls. Apoplexy (hemor- 

 rhage in the brain), or pressure of fluids, causes death at the heart, 

 but primarily at the brain, as seen in cerebral meningitis, where 

 the products of the inflammation cause pressure. Certain drugs, 

 as opium, if used imj)roperly, will cause death in this way. Certain 

 waste products, as urea, accumulating in the blood, cause uraemia. 



