3D Cell Death and Survival Simulation
Survival signals, apoptosis, necrosis and cellular cleanup

Cell fate laboratory

Mission: balance protective signals against cellular damage and observe whether the cell repairs, enters apoptosis, or dies by necrosis.
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Live measurements

Cell stateBalanced
Death pressure0%
Caspase activity0%
Completed outcomes0

The cell is alive and balancing repair, energy supply, and controlled removal. Press Start to test its fate.

Fate-response graph

Survival protectionDeath commitment

Microscope & camera

Focus: noneTap a structure
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Drag to pan. Wheel or pinch to zoom. Tap a receptor, nucleus, DNA, mitochondrion, apoptosome, caspase, membrane bleb, or phagocyte for a compact microscopic view.

Teacher / Demo tools

Interactive teacher-led lesson

After a five-second hook, each sentence changes the active structure, arrow, camera, and microscopic process before the lesson continues.

Ready. Narration will not start automatically.
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Ready for the cell-fate lesson

What to watch: press Start Complete Lecture.

The lesson begins only when you choose to start it.

Learning objectives

  • Compare cell survival, apoptosis, and necrosis.
  • Trace intrinsic apoptosis from DNA damage through mitochondria to caspases.
  • Trace extrinsic apoptosis from a death receptor to the executioner pathway.
  • Explain why apoptosis limits inflammation while necrosis often promotes it.
  • Predict cell fate from survival signals, damage, stress, and ATP.

Key concepts demonstrated

Cells continuously integrate protective and damaging signals. Repair pathways can restore balance. If damage is beyond repair, ATP-powered apoptosis packages the cell safely; severe energy failure can instead cause swelling, rupture, and inflammatory necrosis.

Suggested experiments

  • Raise DNA damage while keeping ATP high and watch intrinsic apoptosis.
  • Use the death-receptor experiment and follow the signal from membrane to caspases.
  • Lower ATP reserve below 20% and compare necrosis with apoptosis.
  • Focus the mitochondrion and step forward through cytochrome-c release.

Questions for exploration

  • Why is a caspase cascade useful for an irreversible decision?
  • How can BCL-2 proteins delay mitochondrial permeabilization?
  • Why does membrane integrity matter to surrounding tissue?

Real-world applications

Cell-death control shapes embryos, maintains adult tissues, removes infected cells, and influences cancer, stroke, heart injury, autoimmunity, and many treatments.

Common misconceptions

  • Apoptosis is an organized biological program, not simply a cell wearing out.
  • Not every damaged cell must die; repair can restore survival.
  • Mitochondria do more than produce ATP; they also regulate apoptosis.
  • Necrosis and apoptosis have different mechanisms and tissue effects.

Cell death and survival challenge

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