The body

• Organelle


  It is a part of the cell and is alot like an organ in the body. An example is the nucleus
• Cell


  It is the basic structural and functional unit of all forms of life an example is plant cells
• Tissue


  Cells with a similar function that are grouped together and example is the tendon
• Organ


  A collection of several tissues carrying out a particular function an example is the heart
• Organ system


  A group of organs that work together in the body to peform complex functions an example is the circulatory system