medium Science and Technology

What is the main function of red blood cells?

Quiz Options

Fight infections
Transport oxygen
Clot blood
Produce antibodies

Explanation

Red blood cells transport oxygen from the lungs to the rest of the body.

CuizIN — Free Online Quiz Game | Play & Learn

Test your knowledge across 15,000+ trivia questions covering history, science, geography, sports, entertainment, literature, mythology, and more. Play free, earn points, climb the leaderboard.

Start Playing → · Create Account · How to Play

Browse Quiz Categories

Popular Sections

Why Play CuizIN?

100% free to play — no payment required
15,000+ trivia questions across 30+ categories
Daily streak bonuses and a global leaderboard
Detailed explanations after every answer
Mobile-friendly with offline support