Differentiate Between Organs and Organelles

Organs and organelles function combined to keep the cells, tissues and other parts of the system to keep an organism alive. Organs and organelles are found in all multicellular organisms.

All multicellular organisms have the same levels of classification –

Cells forms tissues, tissues forms organs, organs form organ systems, and organ systems make organisms.

          Cell   –   Tissues  –   Organs   –   Organ systems   –   Organisms.


An organ is the collection of tissues performing the similar function. An organ is large and forms a part of the body. A group of organs together comprises organ systems. Organs are the large part of an organism. In general, a human body consists of about 78 organs and among them, brain, heart, liver, lungs, kidneys, and are five vital organs for the life existence.


An organelleis a small, specialized structure found inside cells, which carries out a specific life process.Organelles are microscopic and collectively form a cell. They are the functioning unit of all unicellular organisms including amoeba, bacteria, fungi, Protista, etc.

For better understanding, let us learn more in detail about the differences between the Organ and Organelle.

Organs Organelles
Organs are the part of the body. Organelles are the part of the cells.
Found in all multicellular organisms Found only in unicellular organisms
Organs collectively form organ systems Organelles contribute to form a cell.
Performs specific life process in the body. Performs specific process within the cell.
They are macroscopic in structure. They are microscopic in structure.
Brain, Heart, Lungs, are few examples of organs. Mitochondria, Nucleus, Golgi apparatus are few examples of organelles.

Stay tuned with BYJU’S for more detailed information about the organs and organelles.

Practise This Question

Even the simplest organisms like Amoeba possess specialised structures for gas exchange.