### body part | organ | optic:

Physical optic
* approach to dynamical electron diffraction and imaging.
* branch of modern physics.
* is concerned with the creation, nature, and properties of light
  - nature and properties of light itself
* rather abstract field that students often find hard to learn.

Organ donation
* Some organ donations occur while the donor is alive.
* can be the gift of life for many people
  - provide others with a second chance at life
  - t happen without family consent

### body part | organ:

Organelle
* Describe the types and functions of organelles.
* Every organelle has at least one Rab for each transport step.
* Find out the functions of the different parts of a cell.
* Most organelles are interwoven and work based on the work performed by other units in the cell
  - contain pigment
* Most organelles have functions
  - organs
  - specific functions
* Most organelles perform functions
* Some organelles act like oars.
* Some organelles contain chlorophyll
  - enzymes
  - genetic materials
  - grain
  - starch grain
  - substances
  - simultaneously engage multiple motors, for different directions of travel
  - synthesize proteins
* Some organelles use for anaerobic respiration
* allow eukaryotic cells to carry out more functions than prokaryotic cells
  - unicells to perform all the life processes
* also give protection to vital structures.
* are Bacterial endosymbionts in Archaeal hosts
  - diverse membrane-bound compartments in eukaryote cells
  - identified by microscopy , and can also be purified by cell fractionation
  - like the organs in our bodies
  - located within the cytoplasm
  - membrane bound subdivisions, each specialised for a specific function
  - membrane-bordered functional unities of the cell
  - part of cells
* are small structures that exist within cells
  - within cells that perform dedicated functions
* are special areas of the cell that do different work
  - structures in cells that perform specific functions
* are structures inside the cell that have a specific function
  - that perform specific functions for the cell
  - tiny organs within each cell
  - usually specialized, membrane-bound features of a cell
* can be from place to place in a cell by attaching to microtubule track ways.
* carry out specific functions within the cell.
* contain enzymes needed for penetration of host cells
  - ribosomes
  - specialized functions within the cells, such as energy transduction or motility
* includes corpi
  - lobes
* including nucleus, chloroplasts are present, and cell walls are present.
* is an organ
* occupy nearly half the volume of the cell.
* perform specific functions within a cell
  - the vital functions that keep our cells alive
* play vital roles in various cellular activities.
* separate specific reactions in the cell and increase metabolic efficiency.
* serve specific purposes within the cell, ranging from building proteins to making energy.
+ Membrane, Plasma membranes: Cell biology
  * The plasma membrane covers cells. Plasma membranes also divide the cell into different spaces called organelles. Organelles are special areas of the cell that do different work. For example, the nucleus holds the DNA in a cell. The mitochondria make energy for the cell.