Systems of the
human body.
Our body contains trillions of cells – cells are the
smallest recorded living things.
In addition to keeping our cells healthy and clean,
our blood also works for our immune system and
contains antibodies and white blood cells that fight
germs and diseases.
Vital organs are the parts of our body that we need
to stay alive. These include the heart, brain, lungs,
kidneys, liver and pancreas.
Our body has symmetry – that means it looks the
same on the left side as it does on the right side.
The body uses different systems to work properly. Some of these are:
•
•
•
Circulatory system: How our blood
•
moves around.
Digestive system: How the food we
eat turns into nutrients, fats and
•
waste through our stomach and
intestines
Muscular system: How we move
around; our muscles allow us to do
everything from walking and running
to picking things up and laughing at
jokes!
Skeletal system: Another term for
the bones in our body, which
together make up our skeleton
Nervous system: How messages get
sent around our body, through our
brain, so we know when we’re
hungry, when something hurts,
when something smells good and
when something feels soft