For those who have heart disease, exposure to ETS exacerbates their problems because of increased absorption of carbon monoxide which compromises the blood's ability to absorb oxygen.
(those; have; heart disease) (exposure to ETS; exacerbates; their problems; because of increased absorption of carbon monoxide) (carbon monoxide; compromises; the blood's ability to absorb oxygen)
those exposure to ETS carbon monoxide
have exacerbates compromises
heart disease
their problems because of increased absorption of carbon monoxide
the blood's ability to absorb oxygen