Lysosomes digest foreign substances that might harm the cell
A macrophage has engulfed (phagocytized) a potentially pathogenic bacterium and then fuses with a lysosomes within the cell to destroy the pathogen. Other organelles are present in the cell but for simplicity are not shown.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, The Endomembrane System and Proteins. October 16, 2013."
http://cnx.org/content/m44435/latest/Figure_04_04_04.jpg
OpenStax CNX
CC BY 3.0.
