Lysosomes are the cell's cleanup crew. They carry digestive enzymes that they use to break down old, worn-out organelles, debris, or large ingested particles. They help keep the cytoplasm clear of debris.

Cell Organelles: Lysosome
Cell Organelles: Lysosome, By Russell Kightley Media, Picture and brief description.
http://www.rkm.com.au/CELL/organelles/lysosome.htm...
Cell Structure: Lysosomes
Cell Structure: Lysosomes, Biology4kids.com, An introduction to Lysosomes and what they do.
http://www.biology4kids.com/files/cell_lysosome.ht...
Extracellular Digestion and Intracellular Digestion Cell Digestion Explained
Extracellular Digestion and Intracellular Digestion Cell Digestion Explained, Biology Questions and Answers, Study the work of lysosomes, the cell organelle responsible for intracellular digestion
http://www.biology-questions-and-answers.com/intra...
Journey Into the Cell: Lysosomes
Journey Into the Cell: Lysosomes, By Regina Bailey, About.com, "Explore the structure and function of eukaryotic lysosomes."
http://biology.about.com/od/cellanatomy/a/aa012408...
lysosome
lysosome By David Darlings DavidDarling.info Encyclopedia article on lysosomes, with a great illustration.
http://www.daviddarling.info/encyclopedia/L/lysoso...
Lysosome
Lysosome Wikipedia.org Lysosomes are spherical organelles that contain enzymes (acid hydrolases). They break up food so it is easier to digest. Visit the web site for the rest of the article
http://en.wikipedia.org/wiki/Lysosome
Lysosome
Lysosome, Kids.net.au Encyclopedia, Article describing what lysosomes are and what they do.
http://encyclopedia.kids.net.au/page/ly/Lysosome
Lysosome
Lysosome, British Society of Cell Biology, Get a quick look at lysosomes or view an in-depth explanation.
http://bscb.org/learning-resources/softcell-e-lear...
Lysosomes
Lysosomes, By Dr. Karen Carr, Associate Professor of History, Portland State University, Science For Kids See what lysosomes look like under an electron microscope and learn what their function
http://scienceforkids.kidipede.com/biology/cells/l...
Lysosomes
Lysosomes KidsBiology.com Text and illustrations on lysosomes and how they help break down food.
http://www.kidsbiology.com/biology_basics/cells_ti...
Lysosomes and peroxisomes - Video
Lysosomes and peroxisomes, By Khan Academy, YouTube.com, Video length: 05:42.
https://www.youtube.com/watch...
Lysosomes Animation
Lysosomes Animation McGraw-Hill Narrated animation on the function and structure of lysosomes.
http://highered.mcgraw-hill.com/sites/dl/free/0072...