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What is apoptosis?

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Quick answer

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. It's a built-in self-destruct sequence cells can trigger.

Key things to understand

  1. It's a built-in self-destruct sequence cells can trigger.
  2. The cell neatly dismantles itself without spilling harmful contents.
  3. It shapes development — like removing the webbing between fetal fingers.
  4. It clears damaged, infected, or potentially cancerous cells.
  5. Too little apoptosis can allow cancer; too much is linked to degeneration.

People also ask

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.