Related Clues:

• Blood lines
• Streaks in marble
• Life lines?
• Blood carriers
• Lines on leaves
• Places for ore
• Blood vessels
• Where 37 Down is found
• Phlebitis targets
• Arteries' counterparts
• Lines on a leaf
• Inner tubes?
• Injection points
• Thin blue lines, maybe
• It sounds as if the bloody things are what are blowing around