Cristina looks alone and lost in thought. Tough decisions await her in "Can't Fight Biology."

Rating: 5.0 / 5.0 (6 Votes)
Photo Credit:
ABC/Adam Taylor
Grey's Anatomy
Grey's Anatomy Season 7 Episode 4: "Can't Fight Biology"
Cristina Yang
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Grey's Anatomy Season 7 Episode 4 Quotes

(to Meredith) You know this isn't normal.


Biology determines much of the way we live. From the moment we're born we know how to breathe and eat. As we grow older new instincts kick in. We become territorial. We learn to compete. We seek shelter. Most important of all, we reproduce. Sometimes biology can turn on us though. Yeah, biology sucks sometimes.


Grey's Anatomy Season 7 Episode 4 Music

  Song Artist
Until The Last Falling Star Matthew Perryman Jones iTunes
Tumblin Down Jenna Andrews iTunes
Song Further Correatown iTunes