### body part | organ | organelle:

Lysosome
* Some lysosomes contain digestive enzymes
  * work by breaking up larger molecules into smaller molecules. Those smaller molecules can then be used again as building blocks for other large molecules
* also break down old cell parts and release the substances so they can be used again
  - organelles and cells
  - digest old organelles that are no longer useful to the cell
  - participate in the turnover of cellular organelles
* also play a part in getting rid of garbage in a cell
  - an important role in the immune system
* are a major site of intracellular digestion.
* are another membrane-bound organelle found in animals cells
  - structure found in the cytoplasm
  - both in an animal cell and a plant cell
  - bound by a single membrane and contain highly acidic fluid
  - designed to break down complex molecules and pieces of the cell
  - especially active during involution of the mammary gland
  - filled with enzymes that break down many materials
  - found in all animals cells and a few plant cells
  - involved in breaking down material
* are membrane bound particles which contain degradative enzymes
  - bounded organelles found in animal and plant cells
* are membrane-bound organelles responsible for turnover of cellular components
  - vesicles of hydrolytic enzymes
* are organelles in which macromolecules are degraded by specific enzymes
  - responsible for the breakdown of macromolecules
* are responsible for the breakdown and absorption of materials taken in by the cell
  - degradation of intra- and extracellular proteins
  - sac-like compartments that contain a number of powerful degradative enzymes
  - sacs containing digestive enzymes
  - single-membrane organelles
  - small sacs of digestive enzymes in the cell for eating
  - structures somewhat similar in appearance to vacuoles but denser
  - stuctures in cells that play a role in the intracellular digestive system
  - substructures of the cell where many enzymes are stored and do their work
* are the cell s disposable system of trash
  - cellular trash cans that do double-duty as recycling centers
  - compost pile of the cell
  - disposal and recycling units of the cell
  - major digestive units in cells
* are very heterogeneous
  - important cell structures for eucaryotes
  - vesicles bound by a single membrane
* attach to the vacuole.
* can also destroy the cell if it breaks open accidentally
  - help break down food vesicles or can be used to recycle the cell's contents
* contain acid hydrolyses
  - enzymes and help digest nutrients
* contain enzymes that can break down particles entering the cell
  - function optimally in an acidic environment
* containing hydrolytic enzyme are also present.
* degrade proteins taken in by endocytosis.
* digest the vacuole's contents.
* have a pH higher than the cytosol.
* help break down the cell when it dies.
* later digest the vesicle to release the contents.
* merge and digest.
* normally contain proteases.
* play no part in determining which cells are eliminated.
* quickly attach to the vesicle of food and release digestive enzymes.
* synthesize proteins from the recycled amino acids.
* use to break down foreign matter and dead cells.

Mitochondrion
* Mitochondria have cell membranes
  - outer membranes
* Mitochondria includes corpi
  - lobes
  - replicate by fission, as do bacteria
* also play a pivotal role in programmed cell death.
* are located in cells
* has a double membrane system
  - double membrane with an intermembrane space between outer and inner membrane