[Updated at 2:44 p.m. ET]
O'Mara is looking through photos of Zimmerman's injuries trying to find a particular photo.
[Updated at 2:42 p.m. ET]
Rao is explaining how Zimmerman had fine abrasions on parts of his head.
[Updated at 2:39 p.m. ET]
O'Mara made the point that Martin may have been punching Zimmerman's face and the back of the head could have been driven down into concrete.
[Updated at 2:36 p.m. ET]
Rao said the injuries to back of Zimmerman's head are consistent with one blow to concrete. However, she said it is possible there could have been more blows to the concrete.
[Updated at 2:33 p.m. ET]
O'Mara is asking Rao about the swelling of Zimmerman's nose. Rao said the injury to Zimmerman's nose was not severe so the swelling rapidly declined.
[Updated at 2:30 p.m. ET]
Rao concedes that Martin could have hit Zimmerman in the face more than once.
[Updated at 2:27 p.m. ET]
O'Mara asked Rao how much of her work involves homicides. She said Duval County has about a 100 homicides a year.
[Updated at 2:24 p.m. ET]
Prosecutor Guy has finished his questions for Rao. Defense attorney Mark O'Mara is now asking questions about how Rao was appointed to the position as a medical examiner.
[Updated at 2:21 p.m. ET]
Rao said Zimmerman's facial injuries could have been caused by a single blow to the face. She believes the facial injuries are not consistent with someone who was punched a dozen times as Zimmerman said in the interview with Hannity that was just played for the jury.
[Updated at 2:18 p.m. ET]
Rao said she believes Zimmerman's injuries are not consistent with someone who had their head slammed into concrete repeatedly.
[Updated at 2:13 p.m. ET]
Zimmerman only needed some "Band-Aids," according to Rao.
[Updated at 2:11 p.m. ET]
Rao said Zimmerman's injuries were "insignificant." The did not require any "sutures."
[Updated at 2:06 p.m. ET]