Which body system makes your
stomach rumble?
Human body
104
Your cells and tissues are
organized into larger body
parts called organs. In turn,
your organs work together
to form body systems.
Organs
An organ is a body part that
does a specific job. Your heart’s
job, for instance is to pump
blood. Kidneys clean blood.
Organizing
the body
Organ transplant
If a vital organ stops working, doctors
may replace it with an organ from another
person. This is called a transplant.
Systems
Organs and
tissues work in
teams to carry out
major tasks, like
transporting blood
or processing food.
These teams are
called systems.
Heart and blood
Your heart, blood, and
blood vessels make up
the blood system. It
transports vital supplies
around your body.
The tubes that carry
blood away from the
heart are called
arteries (shown
in red).
Heart
Kidney
Brain
The heart is the
largest organ in the
blood system. It
pumps blood around
the body.
The tubes that
carry blood back to
the heart are called
veins (shown in
blue).
