The Human Body
Directs the cell’s activities and
holds information that controls a
cell’s function.
Made of clear, jellylike substance
that contains many cell structures.
Three things that work together to
make your body move.
• muscles
• bones
• nerves
Three stages of digestion of food.
• breakdown
• absorption
• elimination of wastes
System that breaks down food so
the body can use it.
• digestive system
System that transports oxygen.
• circulatory system
System that breaks down food so
the body can use it.
• digestive system
Covers the surface of your body,
inside and out.
Carries electrical messages back
and forth between the brain and
other parts of the body.
Group of organs that work
together carrying out major
functions.
Group of similar cells that perform
the same function.
Perform more complex jobs than
tissues.
• organs
To bend a joint, one muscle does
this while another muscle returns
to its original length.
• contracts
Basic unit of structure and
function in a living thing.
A structure that is made up of
different kinds of tissue
(ex. brain).
Provides support for your body
and connects all its parts (ex. fat).
Forms the outside border of a cell.
Body tissue that contracts, or
shortens, making body parts
move.
Inner framework that includes all
the bones in your body.
Attached to the bones of your
skeleton and provide the force
that moves your bones.
Place in the body where two
bones come together.
Substance that you get from food
and that your body needs to carry
out processes, such as contracting
muscles.
Process where nutrients move
from the digestive system into the
bloodstream.
Organs that release chemical
signals directly into the
bloodstream.
A signal in the environment that
makes you react.
What your body does in reaction
to a stimulus.
Chemical signals released by the
endocrine system and affect
growth and development.
The condition in which an
organism’s internal environment is
kept stable in spite of changes in
the outside environment.
Disrupts homeostasis.
• long-term stress
The reaction of your body to
possible threatening, challenging,
or uncomfortable events.