Transcript The Digestive System

The Digestive System
By: Prescott Jackson
Per: 7
Overview

The digestive system breaks down
food, extracts energy and throws out
the remaining waste
Overview (cont.)
QuickTime™ and a
H.264 decompressor
are needed to see this picture.







The food is:
Chewed and salivated
Pulled down the throat
Broken down in stomach
Absorbed in small intestine
Absorbed in large intestine
Expelled from the body through the anus
Scene Selection:
Mouth
Start
Esophagus
Stomach
Liver &
Pancreas
Small
Intestine
Large
Intestine
Rectum
& Anus
Quiz
Continue
Mouth

Teeth physically rip and grind food into smaller chunks

Salivary glands excrete saliva

Saliva contains both enzymes which chemically break down food, and mucin, a
lubricant that helps food down (http://www.uni-hamburg.de/biologie/index.html)

The broken down food, now called a bolus, falls into the pharynx
(Salivary Glands)
QuickTime™ and a
H.264 decompressor
are needed to see this picture.
Movie
Continue
Throat (Esophagus)

The pharynx is the space between the oral cavity and the esophagus

Muscles move flaps of skin (the soft palate and the epiglottis) to block your
windpipe and nasal cavity

The bolus falls into the esophagus

Smooth muscles progressively contract and expand to squeeze the food down the
esophagus, where it falls into the stomach (this motion is called peristalsis)
QuickTime™ and a
H.264 decompressor
are needed to see this picture.
Movie
Continue
Stomach

Stomach acids continue chemical digestion

Muscles move the stomach wall to churn the food into a thin liquid
called chyme

The chyme is then pushed out of the stomach through the pylorus
and into the duodenum
QuickTime™ and a
H.264 decompressor
are needed to see this picture.
Movie
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
Liver & Pancreas

Bile from the liver and more enzymes from the pancreas
empty into the duodenum

These help with digestion

The chyme now passes into the small intestine
QuickTi me™ a nd a
TIFF (Uncompre ssed ) decomp resso r
are need ed to se e th is p icture.
QuickTime™ and a
H.264 decompressor
are needed to see this picture.
Movie
Continue
Continue
Small Intestine

The small intestine has three sections to it: the duodenum, the jejunum, and the
ileum

As the food passes through the jejunum, nutrients are absorbed through villus,
which line the small intestine

What is left of the chyme passes through the ileum and into the large intestine
QuickTime™ and a
H.264 decompressor
are needed to see this picture.
Movie
Continue
Large Intestine

The chyme that has not been absorbed already enters the large intestine

As it passes through the many parts of the large intestine, remaining nutrients,
as well as the water and salt in your food is absorbed

(the parts of the large intestine are: cecum, ascending colon, transverse colon,
descending colon, and sigmoid colon)

The remaining substance is feces
QuickTime™ and a
H.264 decompressor
are needed to see this picture.
Movie
Rectum & Anus

The feces enters the rectum where it is stored

When enough feces are in the rectum, muscles push the feces through the anus

The feces fall out of the anus, which brings us to…
Parental Controls
Continue
The End
Continue
Quiz!!!!!!!
Continue
After being broken down by saliva, the food substance is called: (slide 5)
Chyme
Bolus
Feces
Bile is excreted from the liver: (slide 8)
Enzymes
Acid
Chyme
Correct
as is
The Motion that squeezes the bolus down the esophagus is called: (slide 6)
Smooth
Muscle
mechanics
Peristalsis
Psyokinetics
Magic
The tentacle structures that absorb food in the small intestine: (slide 9)
villus
sillia
Hot dogs
(Um, no)
scphincters
The middle part of the small intestine: (slide 9)
ileum
jejunum
duodenum
cecum
This Presentation was:
Unspeakably
Horrible
Freakin
AWESOME!
Feces
Worthy of
Slide 11
“You’re
kilin’
me”
-Mr Theil
Continue
Title
Scene
Selection
End Show
Afterward


Yes, the toilet is linked
No, there is not really an animation on slide 11

Here are the two animations I used in their entirety, as well as their links
QuickTime™ and a
H.264 decompressor
are needed to see this picture.
QuickTime™ and a
H.264 decompressor
are needed to see this picture.
Movie
Movie
Back