The "sacrum" is called so when referred to all of the parts combined, but "sacral vertebrae" when referred individually.
Its parts are called "sacral vertebrae" when referred individually. The "sacrum" is called so when referred to all of the parts combined.
The "sacrum" is called so when referred to all of the parts combined. Its parts are called "sacral vertebrae" when referred individually.
The "sacrum" is called so when referred to all of the parts combined. Its parts are called "sacral vertebrae" when referred individually.