Learn about the organs in the body. Get a diagram and list of human organs and discover their location and functions.

In single-celled organisms such as eukaryotes, the functional analogue of an organ is an organelle. In plants, there are three main organs. [3] The number of organs in any organism depends on the definition used. There are approximately 79 organs in the human body; the exact number remains debated. [4]

Since there is no single standard definition of what constitutes an organ, the number of organs vary depending on how one defines an organ. For example, this list contains more than 78 organs (about ~91).

The five vital organs in the human body are the brain, heart, lungs, kidneys, and liver. Other organs include the gallbladder, pancreas, and stomach.

Organ, in biology, a group of tissues in a living organism that have been adapted to perform a specific function. In higher animals, organs are grouped into organ systems; e.g., the esophagus, stomach, and liver are organs of the digestive system. Learn more about organs in this article.

The human body is organised into systems: groups of organs and tissues that work together to carry out a specific function, from movement and circulation to breathing, digestion and defence. Anatomy 3D Atlas covers ten of them in full 3D. Pick a system to see every model it contains, region by region, and follow a single apparatus across the whole body.

What are organs? Organs are specialized structures in your body that handle specific jobs. Some of the best-known organs are your heart, brain or liver. But many other structures count as organs, too. That includes some you might not think of, like your skin.

The most basic unit is the cell; groups of similar cells form tissues; groups of different tissues make up organs; groups of organs form organ systems; cells, tissues, organs, and organ systems combine to form a multicellular organism.

What are the major organs and body parts in the human body? The human body has over 78 organs, but the most vital ones include the brain, heart, lungs, liver, and kidneys.

Explore the human body online with Human Atlas. Rotate a free 3D model, view bones, muscles and organs, and search or isolate anatomical structures. No signup.