Ẹ káàbọ̀! I'm Imisi 🌿 What are you curious about today? Science, life, the world — anything at all.

Wow — that is one of the best questions I've heard this week ✨ It's about oxygen. Want me to explain in 3 short messages?

MSG 1/3: Blood contains haemoglobin — a protein that carries oxygen. When it's full of oxygen (in arteries), it's bright red. When it's given up oxygen to your body (in veins), it becomes darker. 🩸

MSG 2/3: In the body, those dark veins look bluish through your skin because of how light passes through tissue — not because the blood is actually blue! It's still red, just darker red.