Download the digestive system - Life Science Academy

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.The tongue is a muscular organ in the mouth
that is covered in moist, pink tissue called
mucosa
.Tiny bumps called papillae give the tongue
its rough texture
.Thousands of tiny nerve-like cells called,
taste buds, cover the surface of the papillae
.The tongue is vital for chewing, swallowing
food, and speech
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.The pharynx is a fibromuscular tube which
extends from the base of the skull to the
lower border of the cricoid cartilage
.The muscular walls of the pharynx are
compromised of an outer layer made up of 3
circulary disposed muscles, the
CONSTRICTERS
During swallowing successive contraction of
the constricters helps to propel the ball of
food down the esophagus
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.The glands are found in and around your
mouth and throat. We call the major salivary
glands, the parotid, the submandibular and
sublingual glands
.They all secrete saliva into your mouth, the
parotid through tubes that drain saliva, called
salivary ducts, near your upper teeth
submandibular under your tongue and the
sublingual through many ducts in the floor of
your mouth
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.The small intestine is part of the
gastrointestinal tract (gut) following the
stomach and followed by the large intestine
.It is where the vast majority of digestion and
absorption of food takes place
.The small intestine in an adult human
measures about 7 meters in length and 2.53cm in diameters
.Made up of 3 structural parts: Duodenom,
Jejunum, and Ileum
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.Stomach is a muscular organ located on the left
side of the upper abdomen
.As food reaches the end of the esophagus, it
enters the stomach through a muscular valve
called the lower esophageal sphincter
.Stomach secretes acids and enzymes that digest
food. Stomach muscles contract periodically,
churning food to enhance digestion
.Ridges of muscle tissue called rugae line the
stomach
. It’s 12 inches long and 6 inches wide
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.Teeth are hardest substances in the human
body
.Besides being essential for chewing, they
play an important role for speech
.Parts of the teeth include: Enamel, Dentin,
Pulp, Cementum, and the Periodical Ligament
.The normal adult mouth has 32 teeth
.Crown of each tooth projects into the mouth
while the root descends into the gum line,
into the jaw
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. The liver is a large, meaty organ that sits on the
right side of the belly. Weighing about 3 pounds,
the liver is reddish-brown in color and feels
rubbery to the touch. Normally you can't feel the
liver, because it's protected by the rib cage
.The liver has two large sections, called the right
and the left lobes. The gallbladder sits under the
liver, along with parts of the pancreas and
intestines. The liver and these organs work
together to digest, absorb, and process food.
. The liver's main job is to filter the blood coming
from the digestive tract
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. The pancreas is about 6 inches long and sits
across the back of the abdomen, behind the
stomach.
. The head of the pancreas is on the right side
of the abdomen and is connected to the
duodenum (the first section of the small
intestine) through a small tube called the
pancreatic duct
.The main jobs of the pancreas is to produce
digestive juices and produce hormones
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. The gallbladder is a small pouch that sits just
under the liver. The gallbladder stores bile
produced by the liver. After meals, the
gallbladder is empty and flat, like a deflated
balloon. Before a meal, the gallbladder may be
full of bile and about the size of a small pear
. The gallbladder squeezes stored bile into the
small intestine through a series of tubes called
ducts. Bile helps digest fats, but the gallbladder
itself is not essential.
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. The esophagus is a muscular tube connecting
the throat (pharynx) with the stomach. The
esophagus is about 8 inches long, and is lined by
moist pink tissue called mucosa.
. The upper esophageal sphincter (UES) is a
bundle of muscles at the top of the esophagus.
The muscles of the UES are under conscious
control, used when breathing, eating, belching,
and vomiting. They keep food and secretions
from going down the windpipe
.When the lower esophageal sphincter is closed it
prevents acids and stomach contents from
traveling backwards
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. The colon is also called the large intestine. The
ileum (last part of the small intestine) connects to
the cecum (first part of the colon) in the lower
right abdomen.
.The colon is divided into 4 parts: The ascending
colon, the transverse colon, the descending
colon, and the sigmoid colon
. The colon removes water, salt, and some
nutrients forming stool. Muscles line the colon's
walls, squeezing its contents along. Billions of
bacteria coat the colon and its contents, living in
a healthy balance with the body.
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. The lower opening of the digestive tract. It
is associated with the anal sphincter and lies
in the cleft between the buttocks, through
which fecal matter is extruded.
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.http://www.webmd.com/oral-health/picture-of-the-tongue
.http://www.emory.edu/ANATOMY/AnatomyManual/pharynx.html
.http://www.entnet.org/HealthInformation/salivaryGlands.cfm
. http://www.news-medical.net/health/What-Does-the-Small-IntestineDo.aspx
. http://www.news-medical.net/health/What-Does-the-Small-IntestineDo.aspx
. http://www.webmd.com/oral-health/picture-of-the-teeth
. http://www.webmd.com/digestive-disorders/picture-of-the-liver
. http://www.webmd.com/digestive-disorders/picture-of-the-pancreas
. http://www.webmd.com/digestive-disorders/picture-of-thegallbladder
. http://www.webmd.com/digestive-disorders/picture-of-theesophagus
. http://www.webmd.com/digestive-disorders/picture-of-the-colon
. http://dictionary.webmd.com/terms/anus
. http://www.mamashealth.com/organs/stomach.asp