Vomiting can be caused by throat or stomach irritation,
head trauma, dizziness, intense pain, toxic chemical agents, or emotional
factors. The act of vomiting is not directly caused by the stomach
but by the contraction of your diaphragm and abdominal muscles. This increases the pressure in the abdominal cavity and pushes
the digestive contents out of the stomach and even the duodenum
if you vomit strongly. Ever see a green tint in
your vomit. What do you suppose that is? You would only see this green
when vomiting is especially uncontrollable (hint: what green substance
empties into the small intestine?).
Ever have food poisoning? Why didn't the stomach acid
destroy the germs that cause food poisoning? The reason is that these
particular germs make spores or have acid-resistant shells around them. See
Hazard unit on food poisoning.
happens to food after the stomach?
As stomach contents enter the small
intestine, the pH is raised back to normal by the pancreatic secretion of
sodium bicarbonate (NaHCO3).
Due to the acidity of gastric juice, it can be harmful to tissues outside
the stomach, since they do not have mucus layers to protect them.
Bile, delivered from the liver, makes the fats in the in
the liquid become separated so that enzymes can break them down.
Other food materials are broken down by digestive
enzymes secreted from the pancreas. The enzymes secreted by the pancreas
work to reduce the pepperoni, the cheese, and the crust to their simplest
forms- amino acids, fatty acids, and sugars, respectively.
role does the liver play in digestion?
Besides making bile, the liver has many
other important functions. First, the liver processes the carbohydrates,
fats, and proteins absorbed by the small intestine. The liver acts
as the detoxification center of the body by breaking down hormones, drugs,
and other foreign toxins
and also makes the proteins in blood that
are responsible for blood clotting. See the Unit on Detoxication
for more about the liver.
The liver even serves
as a storage compartment for the broken down products of fats, carbohydrates,
and many vitamins and minerals. Lastly, the liver removes worn out
red blood cells and bacteria from the blood stream. The worn out
red blood cells are the major component of the bile that is secreted into
the digestive tract. As you can tell, the liver is a vital organ - not only
for digestion, but for many other systems of the body!
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