Multiple choice

Inside the veins blood appears

  1. blue

  2. bright red

  3. dark red

  4. dark pink

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

It is dark red in its deoxygenated form (i.e., returning to the lungs), when hemoglobin is bound to carbon dioxide to form carboxyhemoglobin i.e. inside the veins.