2.1 describe the levels of organisation within organisms: organelles, cells, tissues, organs and systems

2.1 •organelles are the tiny structures in a cell (e.g nucleus)

      •organelles make up cells, which are specialised (e.g animal cell)

      •cells work together in order to form tissues performing a particular function, containing more than one cell type (e.g xylem tissue, muscle contracts)

      •tissues are organised into organs, all carrying out a function in the body (lungs, heart pumps)

      •organs make up organ systems to perform a job (e.g digestive system, liver)