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T7N - Text number 7 - Nursing
LIVER AND BILIARY
TRACT
The liver, the largest secreting organ in the body,
possesses a major degree of reserve functional
capacity, unusual
resistance to damage by noxious substances, and extraordinary
powers of regeneration. Up to 80% of the liver cells may
damaged without producing severe symptoms, and complete
be
recovery
may ensue. The functions of the liver are many, but accurate
information concerning them is far from complete.
The functional unit of the liver, the hepatic lobule,
may be considered as a tube (bile capillary) the walls of which
are in juxtaposition with cords of liver cells; one end
empties
into a bile duct, while the other end is closed. Bile is excreted
from small canaliculi into the larger capillary and thence into
the duct. Blood from the portal vein enters one end of this unit,
filters past and between the cords of liver cells, and exits
into
the hepatic vein. Blood from the hepatic artery supplies the cells
and also empties into the hepatic vein.
T8N - Text number 8 - Nursing
BRONCHITIS
In the usual infectious form, acute bronchitis is
part of a general acute upper respiratory infection. Onset may
develop from the common cold, or from a pyogenic or
virus
infection of the nasopharynx, throat, or tracheobronquial
tree.
Acute bronchitis is most prevalent inwinter.
Predisposing or contributory factors are exposure, chilling,