Cristina in a shot from "Can't Fight Biology." The episode airs October 14, 2010.

Rating: 4.7 / 5.0 (20 Votes)
Photo Credit:
ABC
Show:
Grey's Anatomy
Episode:
Grey's Anatomy Season 7 Episode 4: "Can't Fight Biology"
Character:
Cristina Yang
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Grey's Anatomy Photos, Grey's Anatomy Season 7 Episode 4 Photos, Cristina Yang Photos
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Grey's Anatomy Season 7 Episode 4 Quotes

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

Derek

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.

Meredith

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