Fact 1: Breathing is when a gill converts from oxygen in water into oxygen in blood.

Fact 2: Hemoglobin transports oxygen in blood.

Given the two facts above, answer the question "Breathing is when a gill converts from oxygen in water into" with the following options: 
- tiny polyps
 - Hemoglobin
 - salmon
 - motility
 - unidirectional
 - exoskeleton
 - heat energy
 - epidermal


 

  Hemoglobin       