أدخل برجلك اليمين ... وعرفنا بيك هنا

من طرف Just a doctor الخميس أغسطس 19, 2010 12:30 am

notes on physiology of digestive system 60774430

notes on physiology of digestive system Fw12j

Be able to name the major organs of the
digestive system, the major types of tissues found in each, the
membranes associated with each, and give the functions of each.
notes on physiology of digestive system Digest19

notes on physiology of digestive system Digest19

The view below illustrates the relative length of each portion and the tube-within-a -tube configuration.
notes on physiology of digestive system Digest20

notes on physiology of digestive system Digest20

At the junction of the stomach, the epithelium
abruptly changes to simple columnar. Within the deeper layers of the
mucosa, are many glandular cells. The outer membrane is the serosa,
which is composed of simple squamous epithelium and connective tissue.
notes on physiology of digestive system Digest25

notes on physiology of digestive system Digest25

What are the digestive contributions of the pancreas?
What are the endocrine functions, and how are they related to digestive
processes?
notes on physiology of digestive system Digest27

notes on physiology of digestive system Digest27

Be able to identify the four lobes of the liver, and give the functions of the liver and gall bladder.
notes on physiology of digestive system Digest28

notes on physiology of digestive system Digest28

Explain the functions of each cell type within the
lobules. Lining the sinusoids are monocytes, which are called Kupffer
cells or stellate reticuloendothelial cells (stellate = star shaped;
reticulo = framework; endothelial = line the inner cavity).
notes on physiology of digestive system Digest29

notes on physiology of digestive system Digest29

From looking at these drawings, what would you guess constitutes a hepatic triad?
notes on physiology of digestive system Digest30

Note that the covering of the abdominal viscera
(visceral peritoneum) is continuous with the lining of the abdominal
wall (parietal peritoneum). However, each region has a different name.
The portion of the mesentery between the liver and stomach is the Lesser
omentum, and the portion supporting the colon is the mesocolon.
Midsagittal view.
notes on physiology of digestive system Digest31

notes on physiology of digestive system Digest31

Frontal view of greater omentum.
notes on physiology of digestive system Digest32

Note modification of internal surface area of
intestines by folds, villi, and microvilli. Each modification of the
internal surface of stomach and intestines increases surface area for
both secretion of enzymes, water, mucus, etc., and for absorption of
nutrients, which must be broken down into their molecular building
blocks.
[url=http://faculty.southwest.tn.edu/rburkett/A&P2 D9.jpg] notes on physiology of digestive system A&P2%20D9

notes on physiology of digestive system A&P2%20D9

[/url]

Micrograph of intestinal villi.
notes on physiology of digestive system Digest33

Drawing of microvilli.
notes on physiology of digestive system Digest34

Electron micrograph of microvilli.
notes on physiology of digestive system Digest35

The plicae are found within the walls of the jejunum,
the middle portion of the small intestine. These folds subdivide the
intestine into segments. Segmental digestive movements of chyme occur
when the remnants of food and digestive juices are mixed back and forth
within these intestinal "segments."
notes on physiology of digestive system Digest36

notes on physiology of digestive system Digest36

The lining of the ileum (not shown) lacks plicae and
villi. An ileocecal valve controls entry into the colon. The vermiform
appendix is a vestigial portion of the cecum, found in humans,
chimpanzees, gorillas, and orangutans.
notes on physiology of digestive system Digest37