Final answer:
The combining form for 'organ' is 'organo-' and the root is 'organ-'. These terms are used in biology to describe parts of an organism that have specific functions, with organs making up organ systems within a multicellular organism.
Step-by-step explanation:
The combining form of the word organ is 'organo-', and the root of the word 'organ' is 'organ-'. In biology, these terms are often used in compound words to describe something pertaining to organs or the overall organism. The term organ itself refers to a part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver.
When considering the organization of living things, it starts at the cellular level with the cell., and for some organisms, a single cell constitutes the entire organism. However, in multicellular organisms, cells combine to form tissues; tissues form organs, organs form organ systems, and organ systems combine to form an organism.