top lungs nutrients waste atria ventricles chamber body blood body blood pumps muscle lungs pumps oxygen bottom chest
The
heart
is
a
located
in
the
.
The
heart
sends
around
your
body
.
The
provides
your
body
with
the
and
it
needs
.
It
also
carries
away
.
The
right
side
of
your
heart
receives
blood
from
the
and
it
to
the
.
The
left
side
of
the
heart
does
the
exact
opposite
:
It
receives
blood
from
the
and
it
out
to
the
.
The
heart
is
made
up
of
four
different
areas
,
and
each
of
these
areas
is
called
a
.
There
are
two
of
them
on
each
side
of
the
heart
.
Two
are
on
the
and
the
other
two
are
on
the
.
The
two
on
the
top
are
called
.
They
fill
with
the
blood
returning
to
the
heart
from
the
body
and
lungs
.
The
two
on
the
bottom
are
called
the
.
Their
job
is
to
squirt
out
the
blood
to
the
body
and
lungs
.