Transcript The Human Body - Make Me Genius

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The Human Body
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Did you Know??!!
•
When you sneeze all body functions stop, even your heart
•
Your brain is 80% water
•
A human has 60,000 miles of blood vessels in their body
•
The lining of your digestive system is shed every 3 days
•
More than half the bones in your body are found in your hands and feet
•
Everyone is color blind at birth
•
1.7 litres of saliva is produced each day
•
About 8 million blood cells die in the human body every second, and the same
number are born each second
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Body System
 THE MUSCULAR SYSTEM
 THE SKELETAL SYSTEM
 THE CIRCULATORY SYSTEM
 THE DIGESTIVE SYSTEM
 THE RESPIRATORY SYSTEM
 THE SENSES
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THE MUSCULAR SYSTEM
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Information about Muscular System
1. How many muscles are there in the human
body?
•
Answer: 640 Muscles
•
Muscles band together to form muscle groups which work together
•
When the muscles contract, they pull on the tendons which pull on
the bones and cause our limbs to move
•
Muscles can be either voluntary or involuntary (consider your arm
vs. your heart which beats 60 to 80 beats every minute without you
having to think about it!)
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Facts about Muscles
• The longest muscle in the body is ___________
• Answer- The Sartorius
• The Sartorius runs from the outside of the hip, down and across to the
inside of the knee. It twists and pulls the thigh outwards.
• The smallest muscle in the body is __________
• Answer- The Stapedius
• The Stapedius is located deep in the ear. It is only 5mm long and
thinner than cotton thread. It is involved in hearing.
• The biggest muscle in the body is __________
• Answer- The Gluteus Maximus
• The Gluteus Maximus is located in the buttock. It pulls the leg
backwards powerfully for walking and running.
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There are about 60 muscles in the face.
Smiling is easier than frowning.
It takes 20 muscles to smile and over 40 to frown.
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The Skeletal System
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Some Facts
• How many bones are there in the human body?
• Answer: 206 Bones
• When you were born, your skeleton had around 350
bones. By the time you become an adult, you will
only have 206 bones. This is because, as you grow,
some of the bones join together to form one bone.
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Inside a Bone
•
Our bones are alive- they have their own nerves and blood vessels, and they do various
jobs, such as storing body minerals.
•
A typical bone has an outer layer of hard or compact bone, which is very strong, dense and
tough.
Inside this is a layer of spongy bone, which is like honeycomb, lighter and slightly flexible.
In the middle of some bones is jelly-called bone marrow, where new cells are constantly
being produced for the blood.
•
•
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The Skeleton
• The Skeleton is the name given to the collection of bones
that holds the rest of our body up. Our skeleton is very
important to us. It does three major jobs:
1. It protects our vital organs such as the brain, the heart and
the lungs.
2. It gives us the shape that we have. Without our skeleton,
we would just be a blob of blood and tissue on the floor.
3. It allows us to move. Because our muscles are attached to
our bones, when our muscles move, they move the bones,
and we move.
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Healthy Bones
• Most of the calcium in your body
is stored in your bones
• Exercise and a good diet help to
keep bones strong
• Vitamin D helps you absorb
calcium so that your bones can
stay strong
• Sources of vitamin D include milk,
salmon, cereal, beef and egg
• When bones break they can heal
themselves, and they are stronger
when they heal than they were
before they were broken!
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Who discovered the X-ray?
ANSWER~
• Wilhelm Roentgen, a physicist at the University of Wursburg,
Germany, discovered radiation “X-rays” on November 8, 1895.
This discovery altered the course of medicine.
• Roentgen refused to patent his discovery or realize financial gain
from it, preferring instead that the world benefit from his research.
• Many fields have emerged in Diagnostic Imaging since
Roentgen’s discovery. The science has expanded to
include General Imaging, CT Scan,
Nuclear Medicine, Ultrasound and MR1
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The Circulatory System
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Blood Cells
______________________________________________
Red blood cells carry oxygen from the lungs to all
the cells of the body while
White blood cells are like soldiers protecting the
body.
______________________________________________
• ARTERIES are vessels that carry blood
AWAY FROM
____________
the heart.
• VEINS are vessels that carry blood
TOWARDS the heart.
_________
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The Heart
• Your heart is a muscle about the size of your clenched fist.
• It is located in the left side of your chest, behind your rib cage and
between your lungs
• It has thick muscular walls and is divided into two pumps.
• Blood from the right side pump is dark red (bluish) and low in oxygen.
• This dark red blood travels along pulmonary arteries to the lungs
where it receives fresh supplies of oxygen and becomes bright red.
• The bright red blood then flows along pulmonary veins back to the
heart's left side pump
• Blood leaves the left side of the heart and travels through arteries
which gradually divide into capillaries.
• In the capillaries, food and oxygen are released to the body cells
• The blood then travels in veins back to the right side of the heart, and
the whole process begins again.
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The Human Heart
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Did You Know??!!
Blood is a liquid organ
 The heart beats around 3 billion times in the average
person's life
• Your blood pressure is the measure of the force of blood as it flows through
the arteries of the cardiovascular system
Within a tiny droplet of blood, there are some 5
million red blood cells, 300 000 platelets and 10 000
white cells.
• It takes about 20 seconds for a red blood cell to circle the whole body.
» Microscopic View of Blood Cells
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About how many red blood cells
are there in one drop of blood?
There are about 5,000,000 Red Blood Cells in ONE
drop of blood.
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The Digestive System
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What have you EATEN today??
• Food provides us with fuel to live, energy to work
and play, and the raw materials to build new cells.
• All the different varieties of food we eat are
broken down by our digestive system and
transported to every part of our body by our
circulatory system.
–We eat about 500kg of food A
Year!
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• The main part of the digestive system is the digestive
tract.
• This is like a long tube, some nine metres in total, through
the middle of the body.
• It starts at the mouth, where food and drink enter the body,
and finishes at the anus, where leftover food and wastes
leave the body
• Every day 11.5 litres of digested food, liquids and
digestive juices flow through the digestive system, but
only 100mls is lost as waste.
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• The Mouth- Teeth bite off and chew food which mixes it
with watery saliva, from 6 salivary glands around the
mouth and face
• The Oesophagus- A muscular tube that takes food from
the mouth to the stomach.
– Food moves through the oesophagus by a muscular movement
know as _____________
» This means that even if you stand on your head, food will still
reach your stomach!
Peristalsis
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The Stomach
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The stomach has a thick muscular wall that contracts to mash up the food
Stomach acids and enzymes begin to break down the nutrients in the food we
eat, particularly the proteins
The liquefied contents of the stomach enter the small intestine for further
processing
As the food is digested in the small intestine it is dissolved into the juices
from the pancreas, liver, and intestine,
The contents of the intestine are mixed and pushed forward to allow further
digestion and absorption of nutrients by the walls of the intestine.
The waste products of this process include undigested parts of the food,
known as fiber, and older cells shed from the lining of the stomach and
intestine.
These materials are propelled into the colon, where they remain, usually for a
day or two, until the feces are expelled by a bowel movement.
– It takes about 20-30 hours to digest
food completely
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The Respiratory System
•The primary function of the
respiratory system is to supply the
blood with oxygen.
•The respiratory system does this
through breathing.
•When we breathe, we inhale oxygen
and exhale carbon dioxide.
•When we inhale oxygen, it goes into
our lungs and is absorbed by the
blood stream
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The Lungs• Inside each of your sponge-like lungs, tubes, called
bronchi, branch into even smaller tubes much like the
branches of a tree. At the end of these tubes are millions of
tiny bubbles or sacs called aleoli.
• They exchange the oxygen for waste products, like carbon
dioxide, which the cells in your body have made and can't
use.
• Once they receive the oxygen, red blood cells turn from
purple to that beautiful red color as they start carrying the
oxygen to all the cells in your body. *The branching out
of the aleoli
creates more
surface area which
in turn allows for
more oxygen to be
absorbed.
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• When we eat, a flap called the ________ -flops down to cover the windpipe so that food
doesn't go down the wrong tube.
epiglottis
• ANSWER- ___________
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Thanks
Submitted by
Aditya
Delhi
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“Don’t make me read, make me understand “
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