EGCSE Biology · Transport in humans · 6 min
The Human Heart:
A pump with four rooms
Narrated explanationReady
Your heart is a muscular pump about the size of your fist. It has four chambers that keep oxygen-rich and oxygen-poor blood apart.
Right side to the lungs, left side to the body.
Explore in 3D
Drag to rotate“Realistic Human Heart” by neshallads on Sketchfab
Atria
The two upper chambers receive blood coming into the heart.
Quick check
1. Which chamber has the thickest muscle wall?
2. Where does the right ventricle send blood?