That one spot of blood looked like it had a bubble. Seems real bright though. Give him some time then start looking. If it was a pass through, eventually the cavity will fill up with blood and the trail should get better.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Looks like lung tissueBubbles
Bubbles
Does the arrow smell like iron or burp?Pics