The liver, gall bladder, and pancreas
are very important components of
the digestive system. And I'm going to
describe the histological structure in
this lecture. At the end of the lecture,
I'd like you to understand the structure of
the liver, its blood supply, the structure
of the hepatic lobule, and what the
hepatocytes do. And also, we're going to look
at the various specializations at the
surface of the hepatocytes, the space of
Disse, and the bile canaliculi, and
what their functions are. We're going to look
at the gall bladder, on how it stores and
concentrates bile. And also, you need to
understand the exocrine components of
the pancreas and the control of the
secretion of these cells as a general
mechanism for controlling the secretion
from salivary glands. The liver is very very
important, and I've listed there the sorts
of functions that the hepatocytes do.
The hepatocytes are the only cell in the
liver that does all the roles of the
liver, apart from a few macrophages and
other very minimal numbers of cells.
The gall bladder concentrates bile, and
the pancreas secretes digestive enzymes.
Let's, first of all, look at the liver.
Shown here in this diagram is the