Animal system and the digestive system
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a system is made up of different parts working together to carry out certain function
A torch needs a few parts working together
A fork does not need other parts to pick up food
such as batteries and light bulb
in order to give off light
It is a system
It is not a system
In living organism
Their bodies consist of several organ system
They work together to support their lives
If any one of the organ system fails
The living organism cannot function properly anymore and will die
Some of the major organ system in the human body include
The digestive system
The respiratory system
The circulatory system
The muscular system
The skeletal system
Mouth
Gullet
stomach
Small intestine
Large intestine
Absorbs water from undigested food
Absorbs digested food into the blood stream
Connect the mouth and the stomach
Breaks down food into simpler substances
Digest the food
Different types of muscles in the body
Helps in the movement of various body parts
Bones
Ligaments
Tendons
Cartilage
Gives the body shape and support
Connect bone to bone
Connect muscle to bone
Nose
Windpipe
Lungs
Diaphragm
It takes in oxygen
Gives out carbon dioxide
Oxygen from lungs moves to heart
Transport oxygen
Heart
Blood vessels
It transport useful substances
It transport waste substances and carbon dioxide from all parts of the body
So that they can be removed
Anus
It is where solid wastes or feaces are passed out of the body
How the size of food affects the speed of digestion
The size affects how fast the food is digested
The size affects the amount of exposed surface area
The smaller the food
The larger the exposed surface area to the digestive juices
The faster it will be digested
The larger the food
The smaller the exposed surface area to the digestive juices
The slower it will be digested