(2.1) Levels of Organisation

What is an organism?

A living thing

What is a unicellular organism?

An organism made from one cell.

What is a multicellular organism?

An organism made up of collections of cells in which

cells are specialised to carry out specific functions.

What is the order of the levels of organisation?

Organelles → cells → tissues → organs → systems which create an organism.

What is an organelle?

A component within a cell that carries out a specific task.

What is a cell?

A basic functional and structural unit in an organism.

What are tissues?

A group of cells of similar structure working together to perform a particular function.

What is an organ?

They are made up of groups of different tissues working together to perform a particular function.

What are organ systems?

They are made up of groups of organs with related functions, working together to perform bodily functions within the organism.