1 2 3 4 5 First discovery · 1/5 The heart is two pumps that drive two loops on the same beat Before memorizing the heart by the names of its four chambers, read it as a double pump — the right side sends to the lungs, the left to the whole body. The blue pulmonary loop and the red systemic loop are separate loops yet connected on the same beat.
Background: Heart physiology overview .
Play the 30-second discovery sequence and follow where the blue loop and the red loop return to the heart.
First Discovery The heart is two pumps that drive two loops at the same time
The blue pulmonary loop and the red systemic loop are pushed out from left and right on the same beat.
Trace the circulation in 30 seconds 2 loops Right Lung Left Body
Discovery check Which view of the heart should you read first in this experience?
Two pumps: the right sends to the lungs, the left to the whole body Just one tube flowing in one direction A single pump that only moves the lungs
Answer the check to continue
Could you explain the core structure of Heart and Circulation: Four Chambers Moving Blood to someone else? Still fuzzy Mostly clear I could explain it I could apply it
Your mental model is forming. Try the checkpoints and connect this space to another system.
What did you notice? What do you want to explore next? Beginner · 20min
Where to go next Nearby expeditions DNA Replication: Unzipping the Double Helix Explore how enzymes unzip, prime, extend, ligate, and repair DNA at the replication fork. CRISPR: Aiming to Rewrite a Single Line Scan Cas9 along a DNA double helix, watch a guide RNA lock onto its target by base complementarity, check for the PAM, cut the double strand, and see mismatches switch specificity off. Synapse: Where Memory Forms Follow one signal as it enters a neuron, becomes a spike, crosses a synapse, and strengthens a pathway into memory. 
