Transcript The Human Body

The Human Body
Melissa Taylor
ET 247
PowerPoint Project
Did You Know?
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More than half the bones in the human body are in the
hands and feet?
The highest recorded “sneeze speed” is 165 km (102 miles)
per hour?
The heart beats about 3 billion times in the average
persons lifetime?
A newborn baby has 350 bones, but a fully-grown adult has
only 206?
Blood is a liquid organ?
Everyone is colorblind at birth?
The surface area of the lungs is approximately the same
size as a tennis court?
Food will get to your stomach even if you’re standing on
your head?
Skin is the largest body organ?
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The average adult is mad up of 100 trillion cells?
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Mouth
The function of the mouth and its
associated structures:
 Form a receptacle for food
 Begin mechanical digestion through
chewing (mastication)
 Swallow food
 Form words in speech
 Assist respiratory system in the passage
of air
www.innerbody.com
The Ear
Organ for hearing and
balance, it consists of
three parts:
 Outer Ear- collect and
transmit sound
 Middle Ear- collect and
transmit sound
 Inner Ear- analyzes sound
waves and maintains the
body’s balance
Heart
The heart is a pumping system which intakes deoxygenated
blood through the veins, delivering it to the lungs for
oxygenation and then pumping it into the various arteries
to be transmitted to where it is needed throughout the
body for energy.
Facts about the heart:
 Size of a fist
 Nightmares can seem so real that the heart will
pound in fear
 Heart rate of a sleeper timed at 150 beats per
min.
 Medical dictionary states that the heart beats
more than 2.5 billion times in an average lifetime.
Lungs
Air in which is inhaled through the mouth and nasal
passages travels through the windpipe or “trachea” into
two main air passages
 Respiratory system mainly contained in two
lungs
 Right lung make up of three compartments,
which contain a branch and stem off into small
“twigs” holding the air sacs that process the
oxygen in the sir to be released into the blood
and expel carbon dioxide which is exhaled
through the nose and mouth
 Left lung contains two sections and encloses
the heart which processes the oxygenated
blood into the lungs for exhalation
Brain
The brain is a jelly-like substance, which in adults weighs
about three pounds!
Divided into three parts:
Brain Stem- extension of spinal cord
Forebrain- consists mainly of
cerebrum
Cerebellum
Esophagus
Muscular tube which carries food and liquids from the throat to the
stomach for digestion after it has been chewed and chemically
softened in the mouth.
 Food is forced downwards by powerful waves of
muscle contractions
 Rings of muscle at the top and bottom that
contract after food passes through and enters
the stomach
Stomach
A hallow, sac-like organ connected to the esophagus and the duodenum.
Several Functions:
 Consist of layers of muscle and nerves that continue the breakdown of
food which begins in the mouth
 Average adult stomach stretches to hold from 2-3 pints and produces
approximately the same amount of gastric juices every 24 hours
 Storage bin
 Food mixer and strong muscles
 Sterilizing system
 Digestive tub