The Levels of Organisation
1. the cell is the basic building block of all living things
2. tissues are made up of a group of similar cells that work together to do a specific job
Example: muscles, nerves
3. Organs: organs are made up of two or more tissues that work together to do a specific job
examples: heart, lungs, kidneys
4. organ systems: a group of organs working together to perform a particular job
ex: digestive, respiratory, reproductive, nervous
organisms: sum of all cells, organs and organ systems, tissues make an organism.
ex: flower, human, animals
All the levels of organisation have a certain job to do or a certain purpose to be in the body. The cells are what the organs are made of. without them they would be no organs and with out organs the body shuts down because there are no functions to keep you going.