Science
What is Apoptosis?
Apoptosis is programmed cell death — a controlled, orderly way the body deliberately destroys cells it no longer needs. Far from harmful, it sculpts growing bodies and removes damaged or dangerous cells before they cause problems.
See it, don’t just read it.
Watch a 2-minute lesson with voice + animation that explains apoptosis.
Key things to understand
- 1It's a built-in self-destruct sequence cells can trigger.
- 2The cell neatly dismantles itself without spilling harmful contents.
- 3It shapes development — like removing the webbing between fetal fingers.
- 4It clears damaged, infected, or potentially cancerous cells.
- 5Too little apoptosis can allow cancer; too much is linked to degeneration.
Frequently asked questions
- Why would the body kill its own cells?
- To sculpt tissues during growth and to safely remove cells that are damaged, infected, or could turn cancerous.
- How is apoptosis different from other cell death?
- Apoptosis is clean and controlled, with the cell tidily packaging itself; injury-based death (necrosis) is messy and triggers inflammation.
- What happens if apoptosis fails?
- Too little lets dangerous cells survive (a route to cancer); too much destroys healthy cells, contributing to degenerative diseases.