There
are
many
interesting
facts
about
the
human
body
.
Let's
take
a
tour
and
test
our
knowledge
.
The
large
bone
of
the
____________________
leg
is
called
the
____________________
.
The
____________________
are
the
organs
that
____________________
our
blood
.
The
number
of
contractions
of
the
heart
per
minute
is
called
our
____________________
____________________
.
The
vessel
that
carries
blood
____________________
from
the
heart
is
called
an
____________________
vein
.
The
organ
that
regulates
____________________
____________________
is
called
the
____________________
.
Cells
that
fight
off
____________________
are
called
____________________
blood
cells
.
The
____________________
portion
of
the
blood
is
called
____________________
.
The
place
where
exchange
of
____________________
and
waste
occurs
within
the
body
is
the
____________________
.
