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Transcript of Human body
In this PowerPoint we'll be talking about the basics of the human body and 8 systems ( although there are 11 systems ) .
consists of the
. Artery, Capillary and Vein are blood vessels, inside of them are
RED BLOOD CELLS
,which carry on oxygen and give it to the
At first the red blood cells get pumped from the heart and then sends them to the artery which then they go to the capillary .The capillaries now release gases (because the other cells need
so the red blood cells get gases from the other cells , and the other cells get oxygen) like
, which is why they get deoxygenated (another reason why they get deoxgenated is that they had given oxygen to every cells that they run out of oxygen , but it run out of oxygen when it's in the capillary) , which then go to the vein (which now is fulfill with carbon dioxide and other gases) and brings it to the heart it goes into the lungs and then gets oxygenated. We will talk about why they get oxygenated in our next topic the
consists of the
, left and right
. First , you breath in oxygen , the hair in your nose is called
, the nasal cavity stops dust particles from entering your body , then the
meets two paths , 1. trachea which is the pathway to the left and right bronchus and 2. esophagus which is a long tube for food entering the stomach , now you maybe wondering , if there is two paths then how does the food go to the esophagus , and oxygen is sent to the trachea , well there is a flap of skin called the
It prevents food from entering the trachea ( if it did you would eventually choke) . After , that the oxygen passed the trachea it meets the left and right bronchus , some of the oxygen goes to the left and bronchus , and some goes to the right bronchus , next the oxygen enters the lungs , there is the left and right lung , by now you should know that if oxygen passes to the right bronchus , oxygen would go to the right lung , and if left bronchus, then the left lung.
The oxygen goes to the bronchi then the oxygen travels to until it meets the bronchi , the bronchi passes it to the aveoli , now here is where the exchange happens . The aveoli meets some red blood cells (which is in the vein ) , so right now the
red blood cells
and the aveoli has oxygen , what happens is they switch , which means that aveoli has carbon dioxide and the red blood cells has oxygen , (well hopefully you know what the red blood cells do with the oxygen) , and well what do the aveoli do with it , well they can not keep it , so they send carbon dioxide directly to your nose .
consists of the
. First ,you chew the food , when you chew the food , the
, in the saliva there are chemicals called
, enzymes make the chewing a lot easier and faster .
After , you have chewed the food it goes down a long tube called the
, which sends the food to the stomach , the stomach releases
, which is an acid that does the digestion in the stomach , ( because the stomach can not do the digestion on it's own ) , now you might be wondering , if the gastric juice is an acid , it's going to eat up the stomach ( because gastric juice is a very strong acid ) , so how does the stomach survive from this acid , well there is a slime called mucus which prevents the gastric juice from eating the stomach . After , the pancreas sends enzymes collects the nutrients ( you might be wondering in the saliva , then why did not the enzymes that are released from the salivary glands collect the nutrients ) , because the enzymes that are from the salivary glands are called enzymes , but the ones released from the pancreas are called
Anyway , the food is turned to
( liquid food ) after all the the fats ( lipids ) by the
and passed to the liver , there are still nutrients in the in the food , so the food goes to the small intestine , where there's small things called villi which are located in your small intestine , so you might be wondering how does the villi collect the nutrients , well the
they collect the nutrients when the food passes by them , so after all the nutrients are absorbed , the wastes ( the things that your body does not need ) , in the scientific way to say wastes is
another word for poo, the feces go around the large intestine ( the far it goes from the small intestine the more wastes are added ) , it stops wondering when the feces meet the rectum ( the rectum is just a storage for feces ) when the
get's filled up the
releases the feces ( the anus is just the finishing touch of the digestive system ) .
is made of the
. The skin has two layers - the
. The epidermis contains several layers and is the upper part of the skin , and the dermis is the lower part , it contains
. Under skin , is
. The hair follicile is a small pocket in your skin where the hair grows in your skin . The sweat gland produces sweat to cool you down , and the sebaceous glands release an oily substance called
, that softens hair , but wait , there are some other stuffs in your skin too .
Like we talked about the
, the arteries supply
( in this case to the skin cells ) , and the
red blood cells in veins come back to the
with wastes ( from the skin cells ) . The
are detectors , they detect whether the skin feels cold , pain or heat , these receptors are connected to the
, the nerves send this message to the brain , or sometimes
actions take place ( which I will be talking about that in the
) . Then there's this tiny muscle which pulls when it's cold , because when your body's cold it needs heat so when the tiny muscle pulls ( your tiny muscle does this by your brain signaling it to ) , your hair sticks out to trap warm air and keep heat from escaping .
So , now you know what now what happens if it is cold or hot , but let's say that there was a sunlight at the direction at your skin , and your skin was the way I was talking about you'd lose numerous of skin cells , luckily your skin contains a specialized cells called
, these cells produce
a substance that passes through the epidermis cells , after the melanocytes have created a screen of melanin , they prevent ultraviolet rays from entering and damaging skin cells . Also , there's a fat layer that your body store and helps keep you warm and it is called
is made up of
. Muscles can function two ways
. The muscles that function in an voluntary way ( voluntary just means that you are doing it what to do ) your voluntary muscles . The involuntary muscles are you having to not tell what to do .
There are 3 muscle types 1.
an involuntary muscle and are muscles that are linked to your
( Cardiac muscle ) is a nonstop
muscle (then of course it is a involuntary muscle ) this muscle that is located to your heart 3.
are long muscle cells linked together in muscular sheets , smooth are your stomach .
is made of the
Bones are made of
, when two bones or more meet it is called a
there are many types of joint , you have the ball and socket joint , saddle joint , plane joint and hinge joint . The bones can not attach them together so
are straps the hold your bones together . If your bones move , they will eventually will grind , luckily
is a substance that is smooth and prevents bones from rubbing each other .
Joints can work in two ways ,
. Immovable joints are joints that can not move and movable joints are joints that can move .
consists of the
. The nervous system is divided into two systems ,
central nervous system
peripheral nervous system
. The central nervous system consists of the brain and spinal cord , and the peripheral nervous system consists of the nerves . The brain is your control center , it can do many functions , it is divided into three parts the
( brain stem ) , the cerebrum does voluntary actions like sensing , thinking and imagination , the cerebellum does voluntary actions too like motion , balance and learning new things , and the medulla does involuntary actions ( in your body ) like automatic actions , etc.
Now you maybe wondering , if we wondering have a brain then why do we need
, well here's why , let's say your book is on the stove you went to get but accidentally put your whole hand went on top of it , if don't have nerves your skin would burn while your standing , luckily you have nerves . Well , then how do nerves function when your brain receives the message from nerves called
, and your brain sends the message back by nerves called
, for example I was about to touch a bowl of hot soup and as soon as I touched , my sensory nerves took the message that it's hot and the brain get's the message and sends back the message by
motor nerves .
Well , you mentioned something about
why do we need it , we need the spinal cord cause it's a shortcut and a highway , there's something called
, this action has to happen immediately , for example if touched a candle , your sensory nerves take the message directly to your spinal cord and that takes it to the brain and the brain gives a signal to the motor nerves telling you to get your hand off of the candle .
consisting of the
, and the
are like a filter for your body , it filters your blood and takes the waste out .
are inside your kidney and make up most of your kidney , they also convert blood that needs to be filtered , here they get the bad particles in the blood and make convert it it urine , also it keeps the
that does not have bad particles .
is passed to the ureter a long pipe to the bladder ( a storage ) and when it's full your brain stem ( medulla ) tells the bladder to release , the urethra releases urine .
OAKRIDGE JUNIOR PUBLIC SCHOOL
IN GRADE 5
MADE BY ADIB