How Contaminants Enter the Body
Date: Monday November 11th, 2013
Three different ways contaminants enter the body:
1. __________________________________________________________
2.__________________________________________________________
3. __________________________________________________________
Pathway into the lungs:
__________ and ____________ to _________________ to ______________
to ____________________ ____________ finally to ____________________
How air is inhaled (breathing in):
____________________ contracts and the _________________ expand which
means ______________is sucked in.
Exhaling:
Diaphragm __________________ so air is _________________ up and out
How oxygen gets to our blood
At the end of the Bronchial tubes are air sacs called ______________________
These are surrounded by small blood vessels called _______________________
Here __________________________ diffuses from the air to the blood
stream.
Also ______________________ leaves the blood stream and is exhaled.
How the Nose is your first defence
Particles such as __________________, __________________, ___________
Get caught by the _________________. The __________________ then move
the particles up and out. You _____________________ or ________________
to finally get the particles and mucus out of your body.
Second Way for Contaminants to Enter the Body – INGESTION
Ingestion is the process of ______________________ and ________________
Digestion is when your body _________________ down food into smaller pieces.
Breaks it into:
________________________________, ____________________, ________
and __________________________and ____________________
Digestion
Starts in the ___________________ with ____________________
Teeth break up the food mechanically. ____________________ lubricates the
food and starts the breakdown of carbohydrates.
Swallow and the food goes down the _____________________ to the stomach.
Then it goes into the ________________________________ where most of it
is absorbed.
The ______________________ is very important because it produces the
enzymes which break down the food into its smallest pieces for absorption.
Absorption
Nutrients are absorbed through the ____________ of the small intestine into
the _______________________ system so they can travel to all cells in the
body.
Food not absorbed passes into the ___________________ intestine. Here
_________________ is absorbed back into the blood stream and waste is
compacted into __________________________.
Body’s Defences
______________________________ is when the contents from the middle of
the intestine and up are forced out through the mouth.
__________________ will filter the blood to remove poisons.
The _______________ is the largest organ and the first defence against the
outside world.
It also makes ___________________
Circulatory System:
Made up of the ______________, ________________, _________________,
and _________________________________
Purpose is to ______________blood and ___________________ to the cells
and remove ____________________
The nutrients are ________________________, ___________________,
______________________, _______________________________
The wastes are: ___________________, ______________, ___________
How this system protects us:
Fights _______________________ with special cells called
_____________ ________________ __________________
Fill in the Digestive diagram and the circulatory diagram